ao afolayan, js mandeep, m abdullah, n s a hamid, t yokoyama.  (2023).  effect of the seed perturbation amplitude on the equatorial spread f initiation during solar minimum.  - advances in space research.  255-267. 

ungku azmi iskandar ungku chulan, mardina abdullah, nor fadzillah abdullah, abdullah ramli.  (2023).  machine learning of irreducible error floor in the space-time trellis code.  - international journal of intelligent engineering informatics.  290-312. 

k.a. yusof, m. abdullah, n. s. abdul hamid.  (2023).  international handbook of disaster research.  - .  15. 

muhammad khairul adib muhammad yusof, nurul shazana abdul hamid, mardina abdullah, siti aminah bahari.  (2023).  petanda gempa bumi siap siaga dengan teknologi sains angkasa.  - majalah impak kluster tse bil1/2023.  18-19. 

nurul shazana binti abdul hamid;mardina bt. abdullah;siti aminah binti bahari.  (2023).  causality between equatorial plasma bubbles phenomenon and counter electrojet current over different solar activity levels.  - .  . 

khairul afifi nasuddin, mardina abdullah, nurul shazana abdul hamid.  (2023).  correlation analysis of geomagnetic parameter with south atlantic anomaly region.  - jurnal kejuruteraan.  237-246. 

mardina abdullah, roslinda rosli, siti aminah bahari, noridawaty mat daud, nor syaidah bahri, sabirin abdullah, badariah bais, gan kok beng, lilia halim, nurul shazana abdul hamid.  (2022).  teknologi pengajaran dan pembelajaran ketika covid-19: inklusif, imersif dan integratif.  - .  167. 

sadia mostofa, mardina abdullah, mohammad tariqul islam, siti aminah bahari, mohammad badal ahmmed.  (2022).  variations of total electron content during quiet and disturbed geomagnetic conditions over malaysia.  - 2022 ieee 6th international symposium on telecommunication technologies (istt).  97-101. 

rasheduzzaman sifat,mohammad rashed iqbal faruque, md bellal hossain, mardina abdullah, mohammad tariqul islam,mayeen uddin khandaker,nissren tamam, abdelmoneim sulieman.  (2022).  development ofdouble c shaped left-handed metamaterial for dual band wifi and satellite communication application with high effective medium radio and wide bandwidth.  - crystals.  1-20. 

nur izzati mohd rosli, nurul shazana abdul hamid, aimi azizan, idahwati sarudin, mardina abdullah, kornyanat hozumi.  (2022).  epb occurrence in southeast asian sector based on solar activity level and season over solar cycle 24.  - jurnal fizik malaysia.  10151-10156. 

nurul shazana binti abdul hamid;mardina bt. abdullah;wan mohd aimran bin wan mohd kamil.  (2022).  identification of stratospheric quasi biennal oscillation impact on equatorial electrojet current .  - .  . 

mardina abdullah.  (2022).  cuaca angkasa kesan kepada langit dan bumi.  - .  101. 

nur izzati mohd rosli, nurul shazana abdul hamid, mardina abdullah, khairul adib yusof, akimasa yoshikawa, teiji uozumi, babatunde rabiu.  (2022).  the variation of counter-electrojet current at the southeast asian sector during different solar activity levels.  - applied sciences.  1-11. 

sadia mostofa, mardina abdullah, mohammad tariqul islam, siti aminah bahari, mohammad badal ahmmed.  (2022).  a gps tec-based ionospheric-m index over malaysia.  - 2022 ieee 20th student conference on research and development (scored).  185-189. 

khairul adib yusof, mardina abdullah, nurul shazana abdul hamid, suaidi ahadi, essam ghamry.  (2022).  statistical global investigation of pre-earthquake anomalous geomagnetic diurnal variation using superposed epoch analysis.  - ieee transactions on geoscience and remote sensing.  1-13. 

rohaida mat akir, mardina abdullah, kalaivani a/p chellapan, siti aminah bahari.  (2022).  meramal ionosfera dengan pendekatan rangkaian neural.  - .  127. 

sulaiman ali mohammad, mohd riduan ahmad, mardina abdullah, park sangjong, shamsul ammar shamsul baharin, norbayah yusop, gaopeng lu and vernon cooray.  (2022).  characteristics of lightning electromagnetic fields produced by antarctica storms.  - atmosphere.  1-17. 

idahwati sarudin, nurul shazana abdul hamid, mardina abdullah, fatin nur syakirah mohd rusli, yuichi otsuka, kazuo shiokawa, clara yatini, siramas komonjinda, ekkarach somboon.  (2022).  variations of zonal wind velocity in the thermosphere observed at southeast asian sector during quiet and active geomagnetic days.  - jurnal fizik malaysia.  10025-10035. 

montadar abas taher, mandeep singh jit singh, mardina abdullah.  (2021).  wireless communication system : power reduction energy consumption.  - .  139. 

mohammad rashed iqbal faruque;mardina bt. abdullah;norbahiah binti misran;mohammad tariqul islam;sabirin bin abdullah.  (2021).  development of open mesh meta-atom mirror for solar radiation absorption.  - .  . 

n.a. elmunim, m. abdullah.  (2021).  ionospheric delay investigation and forecasting.  - .  100. 

mardina abdullah.  (2021).  cakna petanda semula jadi, ramal gempa bumi lebih awal.  - berita harian.  1. 

bello saeed abioye, mardina abdullah, nurul shazana abdul hamid.  (2021).  characteristic of ionospheric parameters over equator region.  - .  148. 

rafidah abd malik, mardina abdullah, sabirin abdullah.  (2021).  komunikasi hf: hubungan ionosfera dan matahari.  - .  193. 

sarani zakaria, andanastuti muchtar, aisyah abdul rahman, wan hanna melini wan mohtar, babul airianah othman, norazlin hassim, abdul munir abd. murad,.  (2021).  peraturan-peraturan universiti kebangsaan malaysia (pengajian siswazah) 2021.  - .  57. 

mardina bt. abdullah;alina marie binti hasbi;mohd azlan shah bin jaafar;siti aminah binti bahari;teh wai leong.  (2021).  development of malaysia ionosperic tec model using spherical harmonic analysis.  - .  . 

khairul adib yusof, mardina abdullah, nurul shazana abdul hamid.  (2021).  isyarat geomagnet untuk peramalan gempa bumi.  - .  135. 

sarani zakaria, aisyah abdul rahman, jaharah a. ghani, zarina abdul latiff, mardina abdullah, abdul munir abd. murad, wan hanna melini wan mohtar, ermy azziaty rozali, mohd hizam hanafiah, kartini aboo talib, mohd aladib samuri, rozainee khairudin, (9).  (2021).  guidelines for conducting oral examination for dissertation/thesis.  - .  1-46. 

teh wai leong;mardina bt. abdullah;sabirin bin abdullah.  (2021).  magnetic classification and structure of sunspots in the active regions associated with solar flares.  - .  . 

n.a. elmunim, m. abdullah, s.a. bahari.  (2021).  comparison of ionospheric vtec predictions using the holt-winter and iri-2016 model in equatorial region.  - 34th general assembly and scientic symposium of the international union of radio science, ursi gass 2021.  1-4. 

s a mohammad, m r ahmad, m abdullah, s a s baharin, s j park, v cooray.  (2021).  azimuth and elevation factors correction for single station lightning electromagnetic field sensor.  - geografia malaysian journal of society and space.  378-392. 

mardina bt. abdullah;lilia bt. halim;badariah binti bais;rosadah binti abd majid;mohd azlan shah bin jaafar;noridawaty binti mat daud;roslinda binti rosli;gan kok beng;nurul shazana binti abdul hamid;nurul hajijah binti hair;sabirin bin abdullah.  (2021).  program pemantauan suar matahari menggunakan ukm-sidĪ€.  - .  . 

roslinda rosli, mardina abdullah, nur choiro siregar, siti aminah bahari, nurul shazana abdul hamid, sabirin abdullah, gan kok beng, lilia halim, noridawaty mat daud, badariah bais.  (2021).  raising students' awareness and achievement in space science with solar flare monitoring project- based approach.  - 7th international conference on space science and communication (iconspace).  290-293. 

siti aminah bahari, nurul shazana abdul hamid, mardina abdullah, sabirin abdullah.  (2021).  examination of solar flare monitoring using a low cost vlf receiver.  - 7th international conference on space science and communication (iconspace).  5-10. 

n.s.arshad, m.abdullah, s.a.samad, n.abdullah.  (2021).  high-intensity lightning recognition system using very low frequency signal features.  - journal of atmospheric and solar-terrestrial physics.  1-9. 

idahwati sarudin, nurul shazana abdul hamid, mardina abdullah, suhaila m buhari, kazuo shiokawa, yuichi otsuka, kornyanat hozumi, punyawi jamjareegulgarn.  (2021).  influence of zonal wind velocity variation on equatorial plasma bubble occurrences over southeast asia.  - journal of geophysical research: space physics.  1-10. 

n i m rosli, n s a hamid, m abdullah, a yoshikawa.  (2021).  defining different type of cej currents based on ground-based geomagnetic data record at langkawi station, malaysia.  - 2nd international conference on space weather and satellite application (icessat) 2020.  1-5. 

nurliyana abdul rahim, mohd hezri mokhtar, muhammad raziq mohd rosli, mardina abdullah, siti aminah bahari.  (2021).  the effects of x-class solar flare monitored by ground-based gps receivers.  - 2021 7th international conference on space science and communication (iconspace).  211-214. 

khairul adib yusof, mardina abdullah, nurul shazana abdul hamid, suaidi ahadi, akimasa yoshikawa.  (2021).  correlations between earthquake properties and characteristics of possible ulf geomagnetic precursor over multiple earthquakes.  - universe.  1-17. 

wan nur izzaty ismail, nurul shazana abdul hamid, mardina abdullah, akimasa yoshikawa, teiji uozumi, zahira mohd radzi.  (2021).  comparison of eej longitudinal variation from satellite and ground measurements over different solar activity levels.  - universe.  1-13. 

khairul adib yusof, mardina abdullah, nurul shazana abdul hamid, suaidi ahadi, essam ghamry.  (2021).  statistical significance of geomagnetic diurnal variation anomalies prior to worldwide earthquake.  - geografia: malaysian journal of society & space.  366-377. 

nur izzati mohd rosli, nurul shazana abdul hamid, mardina abdullah, suhaila m buhari, idahwati sarudin.  (2021).  seasonal variation of post-sunset and post-midnight equatorial plasma bubble in malaysia during moderate solar activity level.  - 7th international conference on space science and communication (iconspace 2021).  294-297. 

nur fatin irdina zulhamidi, mardina abdullah, nurul shazana abdul hamid, khairul adib yusof.  (2021).  possible earthquake precursors observed in geomagnetic variations in the east coast of honshu, japan.  - 7th international conference on space science and communication (iconspace 2021).  71-76. 

wan nur izzaty ismail, nurul shazana abdul hamid, mardina abdullah.  (2021).  impact of the quasi biennial oscillation on the eej intensity.  - 7th international conference on space science and communication (iconspace 2021).  11-15. 

roslinda rosli, mardina abdullah, nur choiro siregar, siti aminah bahari, nurul shazana abdul hamid, sabirin abdullah, gan kok beng, lilia halim, noridawaty mat daud, badariah bais.  (2021).  raising students' awareness and achievement in space science with solar flare monitoring project-based approach.  - 2021 7th international conference on space science and communication.  1-4. 

sulaiman ali mohammad; mardina abdullah; mohd riduan ahmad; shamsul ammar shamsul baharin; sang-jong park; gaopeng lu; vernon cooray.  (2021).  observation of lightning occurrence surrounding antarctica peninsula.  - 2021 35th international conference on lightning protection (iclp) and xvi international symposium on lightning protection (sipda).  1-4. 

rohaida mat akir, kalaivani chellappan, noraide md yusop, mardina abdullah, mariyam jamilah homam.  (2021).  prediction of tec at low latitudes station using neural network model.  - 2021 7th international conference on space science and communication (iconspace).  94-98. 

nouf abd elmunim, mardina abdullah, siti aminah bahari.  (2021).  evaluating the performance of iri-2016 using gps-tec measurements over the equatorial region.  - atmosphere.  1-17. 

teh wai leong;mardina bt. abdullah.  (2021).  exploring magnetic reconnection in space.  - .  . 

saeed abioye bello, nurul shazana abdul hamid, mardina abdullah, akimasa yoshikawa, kornyanat hozumi, takuya tsugawa.  (2021).  equatorial electrojet and electron density over southeast asian region during moderate solar activity condition.  - indian journal of radio and space physics.  125-131. 

sabirin bin abdullah;mardina bt. abdullah;mohammad rashed iqbal faruque;teh wai leong.  (2021).  metamaterial based invisibility cloak for electromagnetic radiation control in space applications.  - .  . 

wan nur arina wan mohd nor, mardina abdullah, mohd riduan ahmad, siti khalijah zainudin, norbayah yusop, wayan suparta, adriana maria gulisano.  (2020).  the response between vtec and lightning activity over the antarctic peninsula.  - polar science.  1-17. 

suhaila m buhari, mardina abdullah.  (2020).  gelembung plasma ruang angkasa aplikasi gps.  - .  145. 

siti aminah bahari, mardina abdullah, tajul ariffin musa, zahra bouya.  (2020).  modelling and mapping ionosphere over malaysia.  - .  117. 

nurul hajijah hair, badariah bais, mardina abdullah.  (2020).  2019 6th international conference on space science and communication (iconspace2019).  - earth to space bulletin.  5-7. 

sabirin abdullah, roslinda rosli,gan kok beng, mardina abdullah, lilia halim, norisza dalila ismail.  (2020).  stem outreach program of smart control helicopter competition in malaysia: a descriptive analysis.  - jurnal kejuruteraan.  29-34. 

mardina abdullah, mohd riduan ahmad,mohd shahrul mohd nadzir, siti aminah bahari, mona riza mohd esa, earle williams, gaopeng lu.  (2020).  characteristic of lighting flashes over antarctica peninsular and its respond to the upper atmosphere progress report 2.  - .  1-10. 

roslinda rosli, mardina abdullah, nur choiro siregar, nurul shazana abdul hamid, sabirin abdullah, gan kok beng, lilia halim, noridawaty mat daud, siti aminah bahari, rosadah abd majid, badariah bais.  (2020).  student awareness of space science: rasch model analysis for validity and reliability.  - world journal of education.  170-177. 

nurliyana abdul rahim, mohd hezri mokhtar, nadirul hasraf mat nayan, muhammad yusof ismail, suhaila m. buhari, mardina abdullah, siti aminah bahari.  (2020).  l-band amplitude scintillations during solar maximum at a low latitude station.  - international journal of advanced trends in computer science and engineering.  465-470. 

muhammad khairul adib, mardina abdullah, nurul shazana abdul hamid.  (2020).  ramalan gempa bumi mencari keseimbangan dengan medan geomagnet.  - dewan kosmik.  42-45. 

khairul adib yusof, mardina abdullah, nurul shazana abdul hamid, suaidi ahadi, akimasa yoshikawa.  (2020).  normalized polarization ratio analysis for ulf precursor detection of the 2009 m7.6 sumatra and 2015 m6.8 honshu earthquakes.  - jurnal kejuruteraan.  35-41. 

nurul shazana abdul hamid, khairul adib yusof, mardina abdullah.  (2020).  geomagnetic field observation for deeper understanding of space and ground phenomena.  - iugonet.  -. 

i. sarudin, n. s. a. hamid, m. abdullah, s. m. buhari, k. shiokawa, y. otsuka, c. y. yatini.  (2020).  equatorial plasma bubble zonal drift velocity variations in response to season, local time, and solar activity across southeast asia.  - journal of geophysical research - space physics.  1-12. 

mardina abdullah, siti aminah bahari.  (2020).  what works well (www) during covid19: shifting to virtual.  - asia-oceania space weather alliance online conference on 2020.  1-17. 

mardina abdullah, mohd riduan ahmad,mohd shahrul mohd nadzir, siti aminah bahari, mona riza mohd esa, earle williams, gaopeng lu, norbayah yusop.  (2020).  characteristic of lighting flashes over antarctica peninsular and its respond to the upper atmosphere progress report 3.  - .  1-11. 

a.o. afolayan, j.s. mandeep, m. abdullah, s.m. buhari.  (2020).  observation of the north-south asymmetry in the equatorial spread f intensity at the brazilian longitude.  - advances in space research.  50-63. 

nouf abd elmunim, mardina abdullah, siti aminah bahari.  (2020).  characterization of ionospheric delay and forecasting using gps-tec over equatorial region.  - annals of geophysics.  1-17. 

mohd faisal ibrahim, aqilah baseri huddin, fazida hanim hashim, mardina abdullah, ashrani aizzuddin abd rahni, seri mastura mustaza, aini hussain, mohd hairi mohd zaman.  (2020).  strengthening programming skills among engineering students through experiential learning based robotics project.  - international journal of evaluation and research in education.  939-946. 

mohd. nizam bin mohd. said;mardina bt. abdullah;khairul nizam abdul maulud;mohd azlan shah bin jaafar;noridawaty binti mat daud;farhanah binti md isa;rawshan ara begum;siti aminah binti bahari;muhamad roszaini bin roslan;nurul hajijah binti hair;sabirin b.  (2020).  low cost earth-space monitoring system.  - .  . 

mohammad tariqul islam;mardina bt. abdullah;sabirin bin abdullah;mohammad rashed iqbal faruque.  (2020).  development of a new double-negative metamaterial inspired multi-band antenna for satellite communication.  - .  . 

n.s. arshad, m. abdullah, s.a. samad & n.m. hatta.  (2019).  lightning severity classification technique using very low frequency signal feature extraction.  - journal of atmospheric and solar-terrestrial physics.  1-10. 

zainuddin mz, abdullah m, abidin zz, bahari sa, asillam mf, hashim mh, radzi z.  (2019).  review on space science research in malaysia.  - asm science journal.  107-124. 

norbayah yusop, mohd riduan ahmad, mardina abdullah, mona riza mohd esa, sulaiman ali mohammad, wayan suparta, adriana maria gulisano and vernon cooray.  (2019).  seasonal analysis of cloud-to-ground lightning flash activity in the western antarctica.  - atmosphere.  1-16. 

mardina abdullah & siti aminah bahari.  (2019).  space weather research in ukm.  - international symposium on space science(isss).  1-43. 

a.o. afolayan, j.s. mandeep, m. abdullah, s.m. buhari.  (2019).  statistics of spread f characteristics across different sectors and iri 2016 prediction.  - advances in space research.  2154-2163. 

mardina abdullah, siti aminah bahari.  (2019).  gnss and ionosphere.  - spirent gnns seminar : timing, navigation & timing solutions.  1-60. 

abimbola o. afolayan, mandeep jit singh, mardina abdullah, suhaila m. buhari, tatsuhiro yokoyama, pornchai supnithi.  (2019).  observation of seasonal asymmetry in the range spread f occurrence at different longitudes during low and moderate solar activity.  - annales geophysicae.  733-745. 

khairul afifi nasuddin, mardina abdullah, nurul shazana abdul hamid.  (2019).  characterization of the south atlantic anomaly.  - nonlinear processes in geophysics.  25-35. 

khairul adib yusof, nurul shazana abdul hamid, mardina abdullah, suaidi ahadi, akimasa yoshikawa.  (2019).  assessment of signal processing methods for geomagnetic precursor of the 2012 m6.9 visayas, philippines earthquake.  - acta geophysica.  1297-1306. 

wan nur izzaty ismail, nurul shazana abdul hamid, mardina abdullah, nurul hafizah mohd shukur, akimasa yoshikawa.  (2019).  variation of equatorial electrojet current profiles over solar phases.  - asm science journal.  125-133. 

khairul adib yusof, mardina abdullah, nurul shazana abdul hamid, suaidi ahadi.  (2019).  on effective ulf frequency ranges for geomagnetic earthquake precursor.  - journal of physics: conference series.  1-8. 

saeed abioye bello, mardina abdullah, nurul shazana abdul hamid, tatsuhiro yokoyama.  (2019).  seaiono: a windows software tool to extract ionogram dataset from south east asia low-latitude ionospheric observation network.  - journal of physics: conference series.  1-6. 

idahwati sarudin, nurul shazana abdul hamid, mardina abdullah, suhaila m buhari.  (2019).  comparison of equatorial plasma bubble zonal drifts and neutral winds velocity over southeast asia.  - journal of physics: conference series.  1-5. 

mardina abdullah, badariah bais, mohd hezri mokhtar, alina marie hasbi.  (2019).  sistem penderiaan suar matahari dan cuaca angkasa.  - .  126. 

idahwati sarudin, nurul shazana abdul hamid, mardina abdullah, suhaila m buhari.  (2019).  equatorial plasma bubbles zonal velocity in the monthly variations over southeast asia.  - the 2018 ukm fst postgraduate colloquium: proceedings of the universiti kebangsaan malaysia, faculty of science and technology 2018 postgraduate colloquium.  1-4. 

mardina bt. abdullah;mohd azlan shah bin jaafar;noridawaty binti mat daud;siti aminah binti bahari.  (2019).  ionospheric environment characterization for biomass calibration over south east asia (ibisco).  - .  . 

wan nur izzaty ismail, nurul shazana abdul hamid, mardina abdullah, akimasa yoshikawa.  (2019).  longitudinal profile of equatorial electrojet derived from ground and satellite based magnetometers.  - the 2018 ukm fst postgraduate colloquium: proceedings of the universiti kebangsaan malaysia, faculty of science and technology 2018 postgraduate colloquium.  1-5. 

s. a. bello, m. abdullah, n. s. a. hamid, b. w. reinisch, a. yoshikawa, a. fujimoto.  (2019).  response of ionospheric profile parameters to equatorial electrojet over peruvian station.  - earth and space science.  617-628. 

mardina abdullah, mohd riduan ahmad, mohd shahrul mohd nadzir, mona riza mohd esa, earle williams, gaopeng lu, siti aminah bahari.  (2019).  characteristic of lighting flashes over antarctica peninsular and its respond to the upper atmosphere progress report 1.  - .  1-6. 

mardina bt. abdullah;mohd azlan shah bin jaafar;nurul hajijah binti hair.  (2019).  bicara matahari : pembangunan sistem pemantauan aktiviti matahari.  - .  1-6. 

sabirin bin abdullah;mardina bt. abdullah;mohammad tariqul islam.  (2019).  modeling of maximum useable frequency (muf) for hf communication in malaysia.  - .  1-5. 

syahril amir mohd, kok beng gan, sabirin abdullah, mardina abdullah.  (2019).  the use of raspberry pi and high resolution sound card for very low frequency signal detection.  - proceeding of the 2019 6th international conference on space science and communication (iconspace).  261-266. 

mardina bt. abdullah;mohd azlan shah bin jaafar;siti aminah binti bahari;nurul shazana binti abdul hamid;sabirin bin abdullah;teh wai leong.  (2019).  investigation of ionospheric plasma bubbles occurrence due to wavelike structure modulation.  - .  1-5. 

norbayah yusop, mohd riduan ahmad, mardina abdullah, siti khalijah zainudin, wan nur arina wan mohd nor, kemal maulana alhasa, mona riza mohd esa, muhammad haziq mohamad sabri, wayan suparta, adriana maria gulisano, vernon cooray.  (2019).  cloud-to-ground lightning observations over the western antarctic region.  - polar science.  84-91. 

roslinda rosli,mardina abdullah, nur choiro siregar, nurul shazana abdul hamid, sabirin abdullah, gan kok beng, lilia halim,noridawaty mat daud, siti aminah bahari, rosadah abd majid, badariah bais.  (2019).  exploring space science through the ukm-sid pi outreach program.  - proceeding of the 2019 6th international conference on space science and communication (iconspace).  253-256. 

m. azman, m. abdullah, s. a. bahari, k. a. yusuf, n. s. h. harith.  (2019).  preliminary result of seismic response prior to mw 9.0 of tohoku earthquake in japan.  - proceeding of the 2019 6th international conference on space science and communication (iconspace).  197-200. 

a. w. nurumira, w.-l. teh, m. abdullah.  (2019).  preliminary results on favorable conditions for electron heating and acceleration during magnetic reconnection.  - proceeding of the 2019 6th international conference on space science and communication (iconspace).  108-111. 

nurul shazana binti abdul hamid;mardina bt. abdullah;sabirin bin abdullah;teh wai leong.  (2019).  investigation of the ionospheric bottom-side profile parameters along the equatorial sector.  - .  1-6. 

rafidah abd malik, mardina abdullah, sabirin abdullah, yokoyama tatsuhiro & clara y. yatini.  (2019).  development of hf modelling in peninsular malaysia during the rise of solar cycle 24.  - defence s & t technical bulletin.  51-60. 

mardina abdullah, badariah bais, nurul hajijah hair, siti aminah bahari, muhamad roszaini roslan..  (2019).  laporan selepas mengadakan persidangan 2019 6th international conference on space science and communication (iconspace2019).  - .  1-22. 

dr. sabirin abdullah, nurul hajijah hair & prof. ir. dr. mardina abdullah.  (2018).  mengawal helikopter dengan alat kawalan mikro.  - impak sekolah @ ukm.  . 

wayan suparta, mardina abdullah & mahamod ismail.  (2018).  space science and communication for sustainability.  - .  348. 

mohd faisal ibrahim, aqilah baseri huddin, fazida hanim hashim, mardina abdullah, ashrani aizuddin abd rahni, seri mastura mustaza, hafizah husain, jamaliah abu bakar.  (2018).  pemantapan kemahiran pengaturcaraan melalui pembelajaran berasaskan pengalaman bagi pelajar kejuruteraan elektrik dan elektronik.  - prosiding peka 2017. k-novasi pengajaran dan pembelajaran ukm 2018: pendidikan 4.0: graduan kalis masa depan.  . 

mohammad rashed iqbal faruque;mardina bt. abdullah;mohammad tariqul islam;wayan suparta;mandeep singh a/l jit singh.  (2018).  development of a new metamaterial based wideband uhf rfid tag sensor for humidity sensing applications.  - .  . 

sabirin bin abdullah;mardina bt. abdullah;mohammad tariqul islam;mohammad rashed iqbal faruque.  (2018).  development of a small satellite with novel compact microstrip patch antenna for high speed communication.  - .  . 

nurul shazana binti abdul hamid;geri kibe anak gopir;mardina bt. abdullah;teh wai leong.  (2018).  determination of equatorial electrojet current variability using ground based magnetometer data.  - .  . 

takuya tsugawa, michi nishioka, mamoru ishi, kornyanat hozumi, susumu saito, atsuki shinbori, yuichi otsuka, akinori saito, suhaila m. buhari, mardina abdullah, pornchai supnithi.  (2018).  total electron content observations by dense regional and worldwide international networks of gnss.  - journal of disaster research.  . 

m. abdullah, r.a. majid, b. bais, n.s. bahri, m.f. asillam.  (2018).  fostering research aptitude among high school students through space weather competition.  - advances in space research.  478-486. 

s. bohanudin, m. ismail, m. abdullah, and f. adlan.  (2018).  minimizing mobile location error based on hybrid toa-cta for heterogeneous network.  - journal of telecommunication, electronic and computer engineering.  . 

alfonsi, l., povero, g., luca, s., cesaroni, c., forte, b., mitchell, c. n., burston, r., veettil, s. v., aquino, m., klausner, v., muella, m. t. a. h., pezzopane m., giuntini a., hunstad, i., franceschi, g. d., musico, e., pini, m. & nine others.  (2018).  analysis of the regional ionosphere at low latitudes in support of the biomass esa mission.  - ieee transactions on geoscience and remote sensing.  . 

mohamad fakhari mehrjardi, hilmi sanusi, mohd. alauddin mohd. ali, mardina abdullah.  (2018).  integrated attitude-orbit dynamics and control of spacecraft systems: state of the art and future trends.  - ieee aerospace & electronic systems magazine.  . 

badariah bais, rosadah abd majid, mardina abdullah, nor syaidah bahri.  (2018).  validity and reliability of students perception and attitude towards space science instrument.  - prosiding peka2017.  . 

mardina abdullah, rosadah abd majid, badariah bais, nor syaidah bahri & mohd hezri mokhtar.  (2018).  space weather monitoring system competition for secondary school students in malaysia.  - international conference on space science and communication (iconspace2017).  . 

rafidah abd malik, mardina abdullah, sabirin abdullah & mariyam jamilah homam.  (2018).  comparison of measured and predicted hf pperating frequencies during low solar activity.  - international conference on space science and communication (iconspace2017).  . 

rafidah abd malik, mardina abdullah, sabirin abdullah & mariyam jamilah homam.  (2018).  comparison of measured and predicted hf operating frequencies during low solar activity.  - international conference on space science and communication (iconspace2017).  . 

suhaila m buhari, roland t. tsunoda, mardina abdullah, tajul ariffin musa & tulasi ram sundarsanam.  (2018).  equatorial plasma bubble for space weather monitoring : spatial relation between large scale wave structures (lswss) and successive equatorial plasma bubbles (epbs) in malaysia.  - international school on equatorial and low-latitude ionosphere (iselion) 2018.  . 

siti aminah bahari, mardina abdullah, zahra bouya, tajul ariffin musa, robyn fiori & suhaila m buhari.  (2018).  mapping the regional ionosphere over malaysia using spherical cap harmonic analysis.  - international school on equatorial and low latitude ionosphere (iselion 2018).  . 

rohaida mat akir, mardina abdullah, kalaivani chellappan & siti aminah bahari.  (2018).  comparison of the neural network and the iri model for forecasting tec over ukm station.  - proceedings of ipi research colloquium 2017.  . 

suhaila m buhari, mardina abdullah & tajul ariffin musa.  (2018).  large scale wave structure prior to the developmet of equatorial plasma bubbles.  - proceedings of ipi research colloquium 2017.  46-48. 

norbayah yusop, mardina abdullah & mohd riduan ahmad.  (2018).  observations of lightning and background electric field in antarctica peninsula.  - proceedings of ipi research colloquium 2017.  75-77. 

siti aminah bahari, mardina abdullah, zahra bouya & tajul ariffin musa.  (2018).  determination of the gps satellite elevation mask angle for ionospheric modeling the ionosphere over malaysia.  - proceeding of ipi research colloquium 2017.  35-38. 

liliahalim,kalaivanichellappan,ruhizanyasin,kamisahosman,zanatoniksan,azminshamrambely,wjulianawahmad,effandizakaria,hafizahhusain,mardinaabdullah,rizafizahothaman,mdizwanmahmud,roslindarosli,ayazidabakar,tmastura tsoh,m.sattar rasul,sabirinab&sitimistima.  (2018).  futuristic multidiscipline stem mentoring program.  - the 17th international expo on inventions and innovations.  . 

rosadah abd majid, mardina abdullah, badariah bais, nor syaidah bahri, mohd hezri mokhtar, siti aminah bahari.  (2018).  relationship between students' attitudes in space science with their achievements in the field.  - creative education.  . 

lilia h., kalaivani c., ruhizan m.yasin, kamisah o., zanaton h.iksan, azmin sham r., w.juliana w.ahmad, effandi z., hafizah h., mardina a, rizafizah o., m.izwan mahmud,roslinda r.,abu yazid a.bakar, t.mastura t.soh, m.sattar rasul,sabirin a, s.mistima.  (2018).  futuristic multidiscipline stem mentoring program.  - rampai penyelidik siri 6.  . 

siti aminah bahari & mardina abdullah.  (2018).  a brief review: response of the ionosphere to solar activity over malaysia.  - international conference on space science and communication (iconspace2017).  . 

rohaida mat akir, mardina abdullah, kalaivani chellappan and siti aminah bahari.  (2018).  ionospheric tec response to the partial solar eclipse over the malaysian region.  - international conference on space science and communication (iconspace2017).  87-95. 

wan nur izzaty ismail, nurul shazana abdul hamid, mardina abdullah, akimasa yoshikawa & teiji uozumi.  (2018).  the longitudinal profile of eej during three phases of solar cycle-24.  - international school on equatorial and low latitude ionosphere.  . 

saeed abioye bello, mardina abdullah & nurul shazana abdul hamid.  (2018).  ionospheric bottomside electron density thickness parameter over southeast asian sector.  - proceedings of ipi research colloquium 2017.  . 

muhammad khairul adib bin muhammad yusof, mardina abdullah, nurul shazana abdul hamid & suaidi ahadi.  (2018).  research proposal presentation - geomagnetic earthquake prediction in southeast asia region.  - japan-malaysia joint seminar on space weather and electromagnetism and intensive course on space magnetohydrodynamics.  . 

siti fatimah azzahra ahmad noh, nurul shazana abdul hamid, mardina abdullah, suhaila m buhari, idahwati sarudin, & wan nur izzaty ismail.  (2018).  kebergantungan gelembung plasma khatulistiwa dan arus tentangan elektrojet di sektor barat asia tenggara.  - undergraduate research journal for applied physics and novel materials.  . 

wan nur izzaty ismail, nurul shazana abdul hamid, mardina abdullah & akimasa yoshikawa.  (2018).  variation of eej longitudinal profile during maximum phase of solar cycle 24.  - proceedings of ipi research colloquium 2017.  . 

idahwati sarudin, nurul shazana abdul hamid, mardina abdullah & suhaila m buhari.  (2018).  zonal velocity drift of equatorial plasma bubbles calculated over southeast asia.  - proceedings of ipi research colloquium.  . 

tam dao, yuichi otsuka, kazuo shiokawa, michi nishioka, mamoru yamamoto, suhaila m. buhari, mardina abdullah and asnawi husin.  (2017).  coordinated observations of postmidnight irregularities and thermospheric neutral winds and temperatures at low latitudes.  - journal of geophysical research: space physics.  7504-7518. 

suhaila m buhari, mardina abdullah, yuichi otsuka, tatsuhiro yokoyama, michi nishioka, alina marie hasbie and takuya tsugawa.  (2017).  pengesanan gelembung plasma di dalam lapisan ionosfera menggunakan penerima gps di asia tenggara.  - sains malaysiana.  879-885. 

n.a. elmunim, m. abdullah, a.m. hasbi, s.a. bahari.  (2017).  comparison of gps tec variations with holt-winter method and iri-2012 over langkawi, malaysia.  - advances in space research.  276-285. 

nurul hajijah hair, mardina abdullah.  (2017).  dewan kosmik.  - bengkel dan pertandingan helikopter kawalan pintar.  17. 

ungku azmi ungku chulan, mardina abdullah, nor fadzilah abdullah.  (2017).  towards the prediction of irreducible error floor in space time trellis code.  - ieee communications letters.  . 

w.-l. teh, w. s. chen, and m. abdullah.  (2017).  derivation of gps tec and receiver bias for langkawi station in malaysia.  - international conference on space science and communication: space science for sustainability, iconspace 2017 (journal of physics: conf. series).  1-6. 

malik, r. a, abdullah, m, abdullah, s, homam, m. j, yokoyama, t, yatini, c. y.  (2017).  prediction and measurement of high frequency radio frequencies in peninsular malaysia and comparisons with the international reference ionosphere model.  - advanced science letters.  1294-1298. 

mardina abdullah, badariah bais, nurul hajijah hair, noor hayati ahmad rasol & noridawaty mat daud.  (2017).  laporan 2017 international conference on space science and communication (iconspace2017).  - .  . 

noridawaty mat daud dan mardina abdullah.  (2017).  penerokaan dan perkembangan angkasa.  - dewan kosmik.  47. 

nurul shazana abdul hamid, wan nur izzaty ismail, mardina abdullah and akimasa yoshikawa.  (2017).  latitudinal and longitudinal profile of eej current during different phases of solar cycle.  - jpgu-agu joint meeting 2017.  . 

nurul shazana abdul hamid, saeed abioye bello, mardina abdullah, bodo reinisch, akimasa yoshikawa.  (2017).  the sq-current and ionospheric profile parameters during solar minimum.  - jpgu agu joint meeting 2017.  . 

hafizah husain, noorfazila kamal, mohd faisal ibrahim, ashrani aizuddin abd rahni dan mardina abdullah.  (2017).  penggunaan scratch sebagai pengenalan pembelajaran pengaturcaraan tahun satu universiti.  - prosiding knovasi pengajaran dan pembelajaran ukm (pendidikan kejuruteraan dan alam bina) 2016.  20-29. 

idahwati sarudin, nurul shazana abdul hamid, mardina abdullah, suhaila m buhari and kazuo shiokawa.  (2017).  zonal drift velocities of equatorial plasma bubble and neutral winds over southeast asia.  - cospar symposium 2017.  . 

wan nur izzaty ismail, nurul shazana abdul hamid, mardina abdullah, akimasa yoshikawa.  (2017).  longitudinal profile of eej during two peaks of sc 24.  - 2nd national school on space and earth electromagnetism (nsosee) 2017.  . 

saeed abioye bello, mardina abdullah, nurul shazana abdul hamid.  (2017).  estimation of ionospheric b- parameter over south-east asia sector using nequick model.  - 2nd national school on space and earth electromagnetism (nsosee) 2017.  . 

saeed abioye bello ,mardina abdullah , nurul shazana abdul hamid.  (2017).  investigation of ionospheric minimum frequency near dip equator.  - advanced science letters.  1329-1332. 

jamaludin badusah, norazah nordin, nor fariza mohd nor, kamal halili hassan, mardina abdullah, mohd juzaiddin ab aziz, marlia mohd hanafiah, helmi norman, wan muna ruzanna wan mohammad, nurul aisyah kamrozzaman.  (2017).  ukm 21st century tr model: membangunkan kemahiran penyelidikan transdisiplin untuk graduan abad ke-21.  - prosiding seminar pendidikan transdisiplin (sted 2017).  1-8. 

s.a. bello, m. abdullah, n.s.a. hamid, a. yoshikawae, a.o. olawepo.  (2017).  variations of b0 and b1 with the solar quiet sq- current system and comparison with iri-2012 model at ilorin.  - advances in space research.  307-316. 

a o afolayan, j s mandeep & m abdullah.  (2017).  equatorial spread f and evening vertical drift variability across the solar epoch.  - 2016 angkasa research colloquium.  10-12. 

mardina abdullah, rosadah abd majid, nor syaidah bahri, badariah bais.  (2017).  pemupukan kemahiran abad ke-21 melalui aktiviti pemantauan cuaca angkasa.  - prosiding seminar pendidikan transdisiplin (sted 2017).  . 

nouf abd elmunim, mardina abdullah, alina hasbi, and siti aminah bahari.  (2017).  investigation on the implementation of the holt-winter method for ionospheric delay forecasting.  - advanced science letters.  1325-1328. 

ahmad ridzuan mohammed shariff, norhazlina harun, mandeep singh jit singh, kalaivani chellappan, wayan suparta, fredolin t. tangang, maszidah muhammad, mardina abdullah, and mohammad tariqul islam.  (2017).  utilization of wind steadiness index for identification of malaysian northeast monsoon onset and withdrawal from 2011 to 2015.  - advanced science letters.  1440-1443. 

rohaida mat akir, mardina abdullah, kalaivani chellapan, alina marie hasbi and siti aminah bahari.  (2017).  comparative study of tec for gistm stations in the peninsular malaysia region for the period of january 2011 to december 2012.  - advanced science letters.  1304-1309. 

i sarudin, n s a hamid, m abdullah and s m buhari.  (2017).  investigation of zonal velocity of equatorial plasma bubbles (epbs) by using gps data.  - international conference on space science and communication: space science for sustainability, iconspace 2017 (journal of physics: conference series).  1-5. 

tv omotosho, sa akinwumi, oo ometan, mo adewusi, js mandeep, m abdullah.  (2017).  earth-space rain attenuation prediction: its impact at ku, ka and v-band over some equatorial stations.  - journal of informatics and mathematical sciences.  359-374. 

siti aminah bahari, mardina abdullah, baharudin yatim.  (2017).  variasi jumlah kandungan elektron ionosfera di malaysia ketika solar minimum.  - sains malaysiana.  1987-1995. 

t v omotosho, s a akinwumi, m r usikalu, o o ometan, m o adewusi and m abdullah.  (2017).  analysis of non-rainy attenuation on earth-space path in ota, southwest nigeria.  - international conference on space science and communication: space science for sustainability, iconspace 2017 (journal of physics: conference series).  1-6. 

w n i ismail, n s a hamid, m abdullah, a yoshikawa and t uozumi.  (2017).  longitudinal variation of eej current during different phases of solar cycle.  - international conference on space science and communication: space science for sustainability, iconspace 2017 (journal of physics: conference series).  1-6. 

s a bello, m abdullah, n s a hamid and b w reinisch.  (2017).  comparison of ionospheric profile parameters with iri-2012 model over jicamarca.  - international conference on space science and communication: space science for sustainability, iconspace 2017 (journal of physics: conference series).  1-7. 

s.m buhari, m. abdullah, t. yokoyama, y.otsuka, m. nishioka, a.m hasbi, s.a bahari and t.tsugawa.  (2017).  climatology of successive equatorial plasma bubbles observed by gps roti over malaysia climatology.  - journal of geophysical research: space physics.  1-11. 

mohammed saeed mohammed, mandeep jit singh, mardina abdullah.  (2017).  new transmitted reference receiver technique to lessen the mui at wpan.  - sylwan.  1-9. 

suparta w, ismail m, abdullah m, faruque m r i, khairul nizam abdul maulud, mohd shahrul mohd nadzir, mandeep singh jit singh, zamri zainal abidin,sabirin abdullah,teh wai leong, md firoz khan, islam m t, bahari s a, daud n m.  (2017).  2017 international conference on space science and communication.  - 2017 international conference on space science and communication.  1-337. 

mohammed saeed mohammed, mandeep jit singh, mardina abdullah.  (2017).  new tr-uwb receiver algorithm design to mitigate mui in concurrent schemes.  - wireless personal communications.  4431-4450. 

n.a.elmunim, m.abdullah and a.m.hasbi.  (2017).  improving ionospheric forecasting using statistical method for accurate gps positioning over malaysia.  - 2016 international conference on advances in electrical, electronic and system engineering (icaeese 2016).  352-355. 

n yusop, w suparta, s k zainudin, w n a w m nor, a m gulisano, h ochoa & m abdullah.  (2017).  association of the atmospheric electric field and thunderstorm activity in antarctic peninsula.  - 7th malaysian international seminar on antarctica (misa 7).  . 

mardina abdullah, rosadah abd majid, nor syaidah bahri, badariah bais.  (2017).  pemupukan kemahiran abad ke-21 melalui aktiviti pemantauan cuaca angkasa.  - seminar pendidikan transdisiplin (sted2017).  . 

mardina abdullah, suhaila m. buhari.  (2016).  gelembungan plasma di angkasa.  - dewan kosmik.  . 

mardina abdullah, noridawaty mat daud.  (2016).  the ukm-sid space weather monitoring programme.  - earth to space: institute of climate change bulletin.  . 

mardina abdullah, kok beng gan, sabirin abdullah, badariah bais, rosadah abd majid.  (2016).  ionospheric flare detection using raspberry pi.  - iswi newsletter.  . 

siti aminah bahari,mardina abdullah,tajul ariffin musa,zahra bouya,alina marie hasbi.  (2016).  climatology of total electron content over malaysia for the period of 2003-2014.  - 16th australian space research conference, australia.  . 

jamaludin badusah, norazah mohd nordin, mardina abdullah, kamal halili hasan, fariza mohd nor, azmi baharudin, marlia hanafiah, wan muna ruzanna wan mohammad, helmi norman, aisyah kamarozzaman.  (2016).  pembangunan modul pembelajaran, model penyelidikan transdisplin abad ke 21, ukm 21st century tr model.  - knovasi pengajaran dan pembelajaran 2016.  . 

r.a. malik,m. abdullah, s. abdullah, m.j. homam.  (2016).  comparison of maximum usable frequency (muf) variability over peninsular malaysia with iri model during the rise of solar cycle 24.  - journal of atmospheric and solar-terrestrial physics.  87-92. 

s.a. bahari, m. abdullah, a.m. hasbi, b. yatim, w. suparta, a. kadokura, g. bjornsson.  (2016).  study of high-latitude ionosphere: one-year campaign over husafell, iceland.  - journal of atmospheric and solar-terrestrial physics.  45-52. 

mardina abdullah,badariah bais,nurul hajijah hair,noridawaty mat daud,noor hayati ahmad rasol.  (2016).  laporan selepas persidangan iconspace 2015.  - .  . 

wayan suparta, maszidah muhammad, mandeep singh jit singh, fredolin t. tangang, mardina abdullah, mohammad tariqul islam.  (2016).  variability of gps water vapor associated with warming activity in peninsular malaysia during the period of 2008 - 2011.  - journal of water and climate change.  240-250. 

khairul nizam abdul maulud, mardina abdullah, wayan suparta, sabirin abdullah, mohammad rashed iqbal furuque, teh wai leong, farhanah md isa, nurul hajijah hair, muhamad roszaini roslan, mohd sayuti c.  (2016).  laporan konsolidasi program pengajian siswazah sarjana sains secara penyelidikan, institut perubahan iklim.  - .  . 

khairul nizam abdul maulud, mardina abdullah, wayan suparta, sabirin abdullah, mohammad rashed iqbal furuque, teh wai leong, farhanah md isa, nurul hajijah hair, muhamad roszaini roslan, mohd sayuti c.  (2016).  laporan konsolidasi program pengajian siswazah doktor falsafah secara penyelidikan, institut perubahan iklim.  - .  . 

farah aniza mohd nazri, j.s mandeep, hafizah hussain & mardina abdullah.  (2016).  evolution of satellite technology for global communication.  - the ingenieur.  . 

m. abdullah, n.a. elmunim, a.m. hasbi and s.a. bahari.  (2016).  statistical approaches of ionospheric correction to improve the accuracy of the gps positioning over malaysia.  - .  . 

malik, r. a., abdullah, m., abdullah, s., homam, m. j., yokoyama, t., yatini, c.y..  (2016).  correlation of the ionospheric f2-layer parameters with muf during the rise of solar cycle 24.  - .  . 

mardina abdullah, badariah bais, rosadah abd majid, gan kok beng, sabirin abdullah, noridawaty mat daud, siti aminah bahari, nor syaidah bahri.  (2016).  raspberry pi: green technology for space weather monitoring.  - impact.  . 

siti aminah bahari, mardina abdullah, tajul ariffin musa, zahra bouya, alina marie hasbi.  (2016).  climatology of total electron content over malaysia for the period of 2003-2014.  - 16th australian space research conference.  46. 

siti nurbaiti ibrahim, mohamad huzaimy jusoh, ahmad asari sulaiman, siti noor aisyah ahmad, mohd zul hilmey makmud, baba musta, mardina abdullah, mhd fairos asillam, nyanasegari bhoo pathy, mohd helmy hashim, yoshikawa akimasa.  (2016).  first geomagnetic observation at sabah, malaysia by using magdas array.  - international journal of simulation: systems, science & technology.  1-8. 

s. a. bahari, m. abdullah, t. a. musa & z. bouya.  (2016).  development of regional ionospheric model using spherical cap harmonic analysis over malaysia : pleminary result.  - 2016 angkasa research colloquium.  15-17. 

norbaizura yaso, alina marie hasbi & mardina abdullah.  (2016).  investigation of ionospheric and geomagnetic response during 2011 tohoku earthquake using ground based measurement.  - indian journal of radio & space physics.  115-125. 

n a elmunim, m abdullah, s a bahari.  (2016).  variations of the ionospheric delay over malaysia.  - 1st international research conference on engineering, science and humanities (ircesh 2016).  208-210. 

s. m. buhari & m. abdullah.  (2016).  the occurrence of an individual structure of equatorial plasma bubble in southeast asian sector.  - 2016 angkasa research colloquium.  1-2. 

t.afifah, f.ramli, s.n.a.ahmad, m.h.jusoh & m.abdullah.  (2016).  daytime and nighttime variations of vlf signal during quiet period.  - 2016 ieee asia-pacific conference on applied electromagnetics, apace 2016.  . 

n a elmunim, m abdullah, s a bahari.  (2016).  variations of the ionospheric delay over malaysia.  - 1st international research conference on engineering, science and humanities 2016 (ircesh).  . 

nouf abd elmunim, mardina abdullah, alina marie hasbi, siti aminah bahari.  (2016).  investigation on the implementation of the holt-winter method for ionospheric delay forecasting.  - 2016 international conference on science and technology applications in climate change.  . 

rohaida mat akir, mardina abdullah, kalaivani chellappan, alina marie hasbi, siti aminah bahari.  (2016).  comparative study of tec for gistm station in the peninsular malaysia region for the period of january 2011 to december 2012.  - 2016 international conference on science and technology applications in climate change.  . 

rosadah abd majid, mardina abdullah, badariah bais, gan kok beng, sabirin abdullah, nor syaidah bahri.  (2016).  pengayaan pembelajaran sains angkasa menggunakan raspberry pi.  - kongres knovasi pnp ukm 2016.  . 

m. abdullah, n.a. elmunim and s.a. bahari.  (2016).  ionospheric regional forecasting using statistical method for gps application.  - 2016 the 4th aoswa workshop, asia oceania space weather alliance.  . 

mardina abdullah.  (2016).  investigation of ionospheric delay forecasting using gps tec measurements over malaysia.  - research bulletin-innovate.  . 

nurul hajijah hair, mardina abdullah.  (2015).  an introduction to angkasa, ukm.  - aoswa link (issue 5, mac 2015).  . 

khairul afifi nasuddin, mardina abdullah, nurul shazana abdul hamid, alina marie hasbi.  (2015).  preliminary study on the near equatorial magnetic field model and south atlantic anomaly.  - 2015 international conference on space science and communication (iconspace), langkawi, malaysia.  310-313. 

rosadah abd majid, mardina abdullah, badariah bais, alina marie hasbi, nor syaidah bahri, siti aminah bahari, mohd hezri mokhtar.  (2015).  malaysian students` perception and attitude towards space science: a pilot study.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  297-301. 

saeed abioye bello, mardina abdullah, nurul shazana abd hamid & isaac abiodun adimula.  (2015).  comparison between bottomside parameter b0, b1 and iri-2012 model: b0,b1 and ah at an equatorial electrojet station.  - international reference ionosphere 2015 workshop (iri2015).  . 

nouf abd elmunim, mardina abdullah, alina marie hasbi.  (2015).  comparison of gps tec variations with holt-winter method and iri- 2012 over langkawi during high solar activity.  - .  . 

mardina abdullah, rosadah abd majid, badariah bais, alina marie hasbi, nor syaidah bahri.  (2015).  fostering research aptitude to high school students through space weather competition.  - .  . 

rohaida mat akir, mardina abdulla, kalaivani chellappan, alina marie hasbi.  (2015).  preliminary vertical tec prediction using neural network: input data selection and preparation.  - 2015 international conference on space science and communication (iconspace).  283-287. 

v. p. bong, w. a. wan zainal abidin, m. abdullah, k. hong ping, t. masri, s. a. bahari, and i. abba.  (2015).  gps signal strength due to ionospheric scintillation: preliminary models over sarawak.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  89-94. 

s.a. bahari, m. abdullah, a.m. hasbi.  (2015).  a review of ionospheric studies in malaysia using gps.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  95-100. 

s. m. buhari, m. abdullah, t. yokoyama, a. m. hasbi, y. otsuka, m. nishioka, s.a. bahari, t. tsugawa.  (2015).  climatology of equatorial plasma bubble observed by myrtknet over the years 2008-2013.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  101-105. 

s. a. akinwumi, t. v. omotosho, a. a. willoughby, j. s. mandeep, m. abdullah.  (2015).  seasonal variation of surface radio refractivity and water vapour density for 48 stations in nigeria.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  . 

t.v. omotosho, m.e. emetere, m.l. akinyemi, m. abdullah, jit .s, mandeep.  (2015).  mathematical investigations of gas flare constituents in oil producing regions of malaysia.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  111-116. 

n.a.elmunim, m.abdullah, a.m.hasbi and a.zaharim.  (2015).  forecasting ionospheric delay during quiet and disturbed days using the holt-winter method.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  132-135. 

malik r. a., abdullah m., abdullah s., homam m. j., yokoyama t., michi, n..  (2015).  ionospheric empirical model: initial approach to muf modeling in the malaysian region.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  252-255. 

s. n. a. ahmad, m. h. jusoh, f. a. m. kasran, m. abdullah, b. veenadhari, t. uozumi, s. abe, a. yoshikawa and m. g. cardinal.  (2015).  variations of ulf and vlf during moderate geomagnetic storm at equatorial region.  - proceeding of the 2015 international conference on space science and communication (iconspace).  256-261. 

t. v. omotosho, o. o. obiyemi, j. s. mandeep, m. abdullah, s. a. akinwumi, a. a. willoughby, o. o. ometan, m. o. adewusi.  (2015).  review of rain attenuation measurements on earth-space links in nigeria.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  . 

i. abba, t. masri, w.a.w.z. abidin, k.h. ping,v.p. bong, n.b. hussaini, m. abdullah.  (2015).  external antenna design for gps signal reception enhancement.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  . 

m.e. emetere, t.v. omotosho, j.s. mandeep and m. abdullah.  (2015).  modeling of magnetic loop antenna for an improved rockets/spacecraft communication operation.  - proceeding of the 2015 international conference on space science and communication (iconspace), 10-12 august 2015, langkawi, malaysia.  149-151. 

bohanudin s., ismail m., abdulah m..  (2015).  the accuracy of time-based hybrid localization technique in heterogenous wireless network.  - journal of theoretical and applied information technology.  35-42. 

mandeep singh jit singh, mardina abdullah, masoud shakiba.  (2015).  intelligent items traceability system rfid vs qr.  - the ingenieur magazine of the board engineers malaysia.  . 

mardina abdullah, siti aminah bahari.  (2015).  space weather research development in ukm through international collaboration.  - .  . 

suhaila m buhari, mardina abdullah, tatsuhiro yokoyama, alina marie hasbi, yuichi otsuka, michi nishioka, takuya tsugawa.  (2015).  a statistical study of equatorial plasma bubble observed by gps roti measurement along 96 to 120 east longitude over the years 2008 to 2013..  - .  . 

n a elmunim1, m abdullah, a m hasbi1, s a bahari.  (2015).  comparison of statistical holt-winter models for forecasting the ionospheric delay using gps observations.  - indian journal of radio & space physics.  28-34. 

malik r.a., abdullah m., abdullah s., homam m.j..  (2015).  the influence of sunspot number on high frequency radio propagation.  - 2014 ieee asia-pacific conference on applied electromagnetics, apace 2014 - proceeding.  107-110. 

zahira radzi, nouf .a. elmunim, mardina abdullah,alina m. hasbi, mandeep singh.  (2015).  comparison of gps-tec with iri/nequick model over malaysia.  - .  . 

siti sarah nik zulkifli, rosdiadee nordin, mahamod ismail, mardina abdullah.  (2015).  investigation of bandwidth allocation based on rat selection in a wireless heterogeneous network for smart home application.  - journal of theoretical and applied information technology.  94-100. 

b. bais, m. abdullah, a. mohamed.  (2015).  development of online project registration and management system (eprm) for masters by coursework.  - journal of engineering science and technology.  18-27. 

sr. dr. khairul nizam abdul maulud, prof. ir. dr. mardina abdullah, prof. madya dr. wayan suparta, dr. sabirin abdullah, dr. mohammad rashed iqbal furuque, dr. teh wai leong, farhanah md isa.  (2015).  laporan semakan program pengajian siswazah sarjana sains (sains angkasa) secara penyelidikan, institut perubahan iklim.  - .  . 

sr. dr. khairul nizam abdul maulud, prof. ir. dr. mardina abdullah, prof. madya dr. wayan suparta, dr. sabirin abdullah, dr. mohammad rashed iqbal furuque, dr. teh wai leong, farhanah md isa.  (2015).  laporan semakan program pengajian siswazah doktor falsafah (sains angkasa) secara penyelidikan, institut perubahan iklim.  - .  . 

sr. dr. khairul nizam abdul maulud, prof. ir. dr. mardina abdullah, prof. madya dr. wayan suparta, dr. sabirin abdullah, dr. mohammad rashed iqbal furuque, dr. teh wai leong, farhanah md isa.  (2015).  laporan semakan program pengajian siswazah sarjana sains (astronautik) secara penyelidikan, institut perubahan iklim.  - .  . 

sr. dr. khairul nizam abdul maulud, prof. ir. dr. mardina abdullah, prof. madya dr. wayan suparta, dr. sabirin abdullah, dr. mohammad rashed iqbal furuque, dr. teh wai leong, farhanah md isa.  (2015).  laporan semakan program pengajian siswazah sarjana sains (pengurusan angkasa dan polisi) secara penyelidikan, institut perubahan iklim.  - .  . 

sr. dr. khairul nizam abdul maulud, prof. ir. dr. mardina abdullah, prof. madya dr. wayan suparta, dr. sabirin abdullah, dr. mohammad rashed iqbal furuque, dr. teh wai leong, farhanah md isa.  (2015).  laporan semakan program pengajian siswazah doktor falsafah (astronautik) secara penyelidikan, institut perubahan iklim.  - .  . 

sr. dr. khairul nizam abdul maulud, prof. ir. dr. mardina abdullah, prof. madya dr. wayan suparta, dr. sabirin abdullah, dr. mohammad rashed iqbal furuque, dr. teh wai leong, farhanah md isa.  (2015).  laporan semakan program pengajian siswazah doktor falsafah (pengurusan angkasa dan polisi) secara penyelidikan, institut perubahan iklim.  - .  . 

y.l. soon, k.b. gan & m. abdullah.  (2015).  development of very low frequency (vlf) data acquisition system using raspberry pi.  - the international conference on space science and communication (iconspace).  485 - 488. 

jamaludin badusah, nor fariza mohd nor, mardina abdullah, mohd juzaiddin abd aziz, norazah nordin, azmi baharudin, marlia mohd hanafiah, wan muna ruzanna wan mohammad, helmi norman,kamal halili hassan.  (2015).  pembangunan kemahiran insaniah melalui modul kemahiran penyelidikan graduan ukm penyelidik mahir.  - .  . 

aramesh seif, roland t. tsunoda, mardina abdullah, alina marie hasbi.  (2015).  daytime gigahertz scintillations near magnetic equator: relationship to blanketing sporadic e and gradient-drift instability.  - earth, planets and space.  1-13. 

w.-l. teh & m. abdullah.  (2015).  mhd reconstruction of a magnetic cloud in the solar wind.  - 2015 international conference on space science and communication.  . 

nurul hajijah hair, mardina abdullah.  (2015).  iconspace2015: space technology for humanity.  - earth to space institute of climate change bulletin.  1-5. 

mardina abdullah, siti aminah bahari, badariah bais, alina marie hasbi, rosadah abd majid, mohd hezri mokhtar, nor syaidah.  (2015).  space weather innovation competition for school stedents in malaysia.  - international journal of humanities, arts and social sciences.  70-74. 

wayan suparta, mardina abdullah, mohd alauddin mohd ali, siti aminah bahari, mhd fairos asillam, zahira mohd radzi.  (2015).  understanding equatorial environment (in and from space).  - .  . 

shariff, a.r.m.; singh, m.s.j.; chellappan, k.; suparta, w.; tangang, f.t.; salimun, e.; muhammad, m.; abdullah, m.; islam, m.t..  (2015).  initial observations of cold surge frequency over southeast asia in relation to enso-induced anomalies.  - 2015 international conference on space science and communication (iconspace), langkawi, malaysia.  453-458. 

shariff, ahmad ridzuan mohammed; singh, mandeep singh jit; chellappan, kalaivani; suparta, wayan; tangang, fredolin t.; salimun, ester; muhammad, maszidah; abdullah, mardina; islam, mohammad tariqul.  (2015).  a preliminary study of cold surges and precipitation during the northeast monsoon season over malaysia.  - advanced science letters.  185-188. 

teh w.-l., abdullah m., hasbi a.m..  (2015).  lack of relationship between geoeffectiveness and orientations of magnetic clouds with bipolar b z and unipolar southward b z.  - planetary and space science.  27-34. 

tv omotosho, ml akinyemi, js mandeep, m abdullah.  (2014).  total atmospheric absorption of fixed satellite communication signal due to oxygen and water vapor in nigeria.  - ieee antennas and propagation magazine.  56(2):108-121. 

suhaila m buhari,mardina abdullah, alina marie hasbi, yuichi otsuka, michi nishioka, takuya tsugawa.  (2014).  the spatial and temporal evolution of equatorial plasma bubble observed using ground based gps tec measurement.  - japan geoscience union meeting 2014.  . 

tv omotosho, js mandeep, m abdullah.  (2014).  cloud cover cloud liquid water and cloud attenuation at ka and v bands over equatorial climate.  - meteorological applications.  21:777-785. 

suhaila m buhari, mardina abdullah, alina marie hasbi, yuichi otsuka.  (2014).  two-dimensional structure of equatorial plasma bubble observed using gps networks in south east asia region.  - 2014 international conference on electronics, information and communications (iceic).  . 

ibrahim y. sokar, md. yusoff jamaluddin, mardina abdullah.  (2014).  short-term performance prediction model for aviation job-shop.  - journal of applied sciences, engineering and technology.  7(7):1256-1261. 

mohammad nukman bin mohamad nordin, nur hanisah binti ismail, muhd nur iqbal bin yunus, salleh huddin bin abdul rashid, afifah binti mohamad radzi, norfiza binti apfandi, mardina binti abdullah.  (2014).  the impact of solar flare towards technology.  - future scientists conference 2014.  . 

mardina abdullah, alina marie hasbi and badariah bais.  (2014).  space weather innovation competition.  - iswi newsletter.  . 

s. m. buhari, m. abdullah, a.m. hasbi, y. otsuka, t. yokoyama, m. nishioka, and t. tsugawa.  (2014).  continuous generation and two-dimensional structure of equatorial plasma bubbles observed by high-density gps receivers in southeast asia.  - journal of geophysical research:space physics.  10,569-10,580. 

fredolin tangang @ tajudin mahmud, liew ju neng, mohd. alauddin mohd. ali, abdul aziz jemain, sahibin @ sahibini abd rahim, mohammad tariqul islam, wayan suparta, muzzneena ahmad mustapha, et. al..  (2014).  the science od tropical climate change.  - .  . 

suhaila m buhari,mardina abdullah,alina marie hasbi,yuichi otsuka,siti aminah bahari,mohd hezri mokhtar, michi nishioka and takuya tsugawa.  (2014).  the observation of equatorial plasma bubble using all sky imager and gps tec measurement.  - 2014 xxxist ursi general assembly and scientific symposium (ursi gass 2014).  2805-2808. 

mardina abdullah, siti aminah bahari, badariah bais, alina marie hasbi, rosadah abd majid, mohd hezri mokhtar, norsyaidah bahri.  (2014).  space weather innovation competition for school students in malaysia.  - multidisciplinary innovation for sustainability and growth (misg-2014).  . 

zahira mohd radzi, mardina abdullah, alina marie hasbi, mandeep singh jit singh.  (2014).  variability of vertical total electron content (vtec) at bangi, malaysia.  - .  . 

ahmad s.n.a., jusoh m.h., shariff k.k.m., abdullah m., asillam m.f., veenadhari b., uozumi t., abe s., yoshikawa a., cardinal m.g..  (2014).  data processing method to classify pc5 ulf pulsations due to solar wind perturbations at equatorial region.  - wseas transactions on signal processing.  337 - 344. 

malik, r. a., abdullah, m., abdullah, s., homam, m. j..  (2014).  the influence of sunpsot number on high frequency radio propagation.  - 2014 ieee asia-pacific conference on applied electromagnetics (apace).  . 

wai leong, teh; mardina, abdullah; alina, hasbi.  (2014).  evidence for the core field polarity of magnetic flux ropes against the reconnection guide field.  - journal of geophysical research: space physics.  1-5. 

mardina bt. abdullah, badariah binti bais, baharudin bin yatim, mohd. alauddin bin mohd. ali, rosadah binti abd majid, siti aminah binti bahari, alina marie binti hasbi, noridawaty binti mat daud.  (2014).  pemantapan pembelajaran sains angkasa kepada pelajar sekolah melalui pemantauan cuaca angkasa dengan alat penerima vlf.  - .  . 

intan izafina idrus, mardina abdullah, alina marie hasbi, asnawi husin.  (2013).  observation of large-scale traveling ionospheric disturbance over peninsular malaysia using gps receivers.  - international journal of electrical, electronic science and engineering.  . 

nouf abd elmunim ahmed ismail; mardina abdullah; alina marie hasbi; siti aminah bahari.  (2013).  short-term forecasting ionospheric delay over ukm, malaysia, using the holt-winter method.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

wayan suparta, faizatul noor abu bakar, mardina abdullah.  (2013).  remote sensing of antarctic ozone depletion using gps meteorology.  - international journal of remote sensing.  34(7):2519-2530. 

siti nurbaiti ibrahim; khairul khaizi mohd shariff; ahmad asari sulaiman; mohamad fahmi hussin; syed abdul mutalib al junid; mardina abdullah.  (2013).  locating tweeks atmospherics source using world-wide lightning location network (wwlln) data.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

aramesh seif; mardina abdullah; alina marie hasbi.  (2013).  seasonal variations of amplitude scintillation events using gps data at malaysia.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

mohd masri abd rashid; mahamod ismail; mohammad mohammadpour salut; alina marie hasbi; mardina abdullah.  (2013).  vlf observation of d-region disturbances associated with solar flares at ukm selangor malaysia.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

omotosho temidayo victor; alex a. willoughby; akinyemi marvel lola; mandeep singh; mardina abdullah.  (2013).  one year results of one minute rainfall rate measurement at covenant university, southwest nigeria.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

norbaizura yaso, alina marie hasbi, mardina abdullah.  (2013).  investigation of ionospheric response due to tohoku earthquake using gps satellite measurements.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

tv omotosho, js mandeep, m abdullah, at adediji.  (2013).  distribution of one-minute rain rate in malaysia derived from trmm satellite data.  - annales geophysicae.  31(11):2013-2022. 

mustafa dh. hassib, js mandeep, rosdiadee nordin, mahamod ismail, mardina abdullah and m.t. islam.  (2013).  adaptive modulation for space-time block code ofdm systems based on the dispersion of symbol.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

tv omotosho, aa willoughby, ml akinyemi, js mandeep, m.abdullah3.  (2013).  one year results of one minute rainfall rate measurement at covenant university southwest nigeria.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

intan izafina idrus, mardina abdullah, alina marie hasbi, asnawi husin, baharuddin yatim.  (2013).  large-scale traveling ionospheric disturbances observed using gps receivers over high-latitude and equatorial regions.  - journal of atmospheric and solar-terrestrial physics.  102:321-328. 

mardina abdullah.  (2013).  how does it work : space-based navigation system - gps.  - the ingenieur- magazine of the board of engineers malaysia.  . 

mardina abdullah.  (2013).  melancong ke angkasa.  - dewan kosmik.  . 

muhammad, maszidah ; abdullah, mardina ; singh, mandeep jit ; suparta, wayan ; islam, mohammad tariqul ; tangang, fredolin.  (2013).  characterization of gps pwv during flooding event over keningau, sabah.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

mustafa dh. hassib, j.s. mandeep, mahamod ismail, rosdiadee nordin, mardina abdullah, m.t. islam.  (2013).  adaptive modulation for space-time block code ofdm systems based on evm.  - ieice communications express.  2(2):74-79. 

t.v. omotosho, j.s mandeep, mardina abdullah.  (2013).  impact of cloud, on fixed satellite communication links on earth-space-path, at ka, and v-band in the africa continent.  - international journal of engineering and technology.  3(1):11-20. 

temidayo victor omotosho, jit singh mandeep, mardina abdullah.  (2013).  cloud attenuation studies of the six major climatic zones of africa for ka and v satellite system design.  - annals of geophysics.  56(5):1-18. 

abdullah m., bais b., hasbi a. m., abd m. r., yatim b., mohd a. m. a, bahari s.a., mat d. n., mokhtar m. h., mohd z. a. f., asillam m.f..  (2013).  development of ukm-sid teaching module for space science education.  - procedia social and behavioral sciences - 6th international forum on engineering education (ifee 2012).  80-85. 

zahira m. radzi, mardina abdullah, alina marie hasbi,js mandeep,siti aminah bahari.  (2013).  seasonal variation of total electron content at equatorial station, langkawi, malaysia.  - proceeding of the 2013 ieee international conference on space science and communication (iconspace).  . 

mardina abdullah, badariah bais, alina marie hasbi, rosadah abd majid, baharudin yatim, mohd alauddin mohd ali, siti aminah bahari, noridawaty mat daud, mohd hezri mokhtar and mhd fairos asillam..  (2012).  development of ukm-sid teaching module for space science education.  - international forum on engineering education 2012 (ifee 2012).  . 

badariah bais, mardina abdullah, azah mohamed.  (2012).  initial development of project monitoring system for masters coursework.  - procedia - social and behavioral sciences.  . 

m. m. salut, m. abdullah and m. a. mohd ali.  (2012).  vlf observation of lightning-induced perturbations at ukm, malaysia.  - international conference on engineering and built environment (icebe 2012).  . 

aramesh seif, mardina abdullah, alina marie hasbi, yuhua zou.  (2012).  investigation of ionospheric scintillation at ukm station, malaysia during low solar activity.  - acta astronautica.  81:92-101. 

mardina abdullah, alina marie hasbi, siti aminah bahari, muhammad norshafiq abd kadir.  (2012).  forecasting ionospheric delay at ukm using statistical method.  - aogs-agu (wstp) joint assembly.  . 

wayan suparta, faizatul noor abu bakar and mardina abdullah.  (2012).  coreless winter characteristics observed with global positioning system receivers over antarctic and arctic regions.  - american journal of applied sciences.  9(8):1203-1213. 

mardina abdullah, badariah bais, azah mohamed.  (2012).  pembangunan sistem pengurusan dan penilaian projek sarjana kerja kursus secara atas talian.  - kongres pengajaran & pembelajaran ukm2012 15-18 disember 2012, awana, genting, penerbit ukm.  . 

mardina abdullah.  (2012).  space science community program with school students.  - angkasa bulletin.  . 

wong pik wah, mardina abdullah, alina marie hasbi, siti aminah bahari.  (2012).  development of a vlf receiver system for sudden ionospheric disturbances (sid) detection.  - 2012 5th ieee asia-pacific conference on applied electromagnetics, apace 2012; melaka; malaysia.  . 

mardina abdullah, m.m. salut.  (2012).  very low frequency remote sensing of ionosheric disturbances caused by lightning discharges.  - innovate : research bulletin engineering and built engineering.  . 

norbahiah misran, baba mohd. deros, zahira yaacob, shahrom abdullah, n. e. shanmugam, siti kartom kamaruddin, zamri chik, mardina abdullah, wardah fatimah mohd yusoff, ahmad ashrif a. bakar, farizah ansarudin, mohd fairus awang, arif mohd sham.  (2012).  jurnal kejuruteraan.  - jurnal kejuruteraan.  1-43. 

m.m. salut, mardina abdullah.  (2012).  detecting subionospheric eraly vlf pertubations at malaysia.  - innovate : research bulletin engineering and built engineering.  . 

salut, m.m. , abdullah, m, graf, k.l, cohen, m.b, cotts, b.r.t., kumar.s,.  (2012).  long recovery vlf perturbations associated with lightning discharges.  - journal of geophysical research a: space physics.  117(8):Art.no A08311. 

mardina abdullah, siti aminah bahari and mohd alauddin mohd ali.  (2012).  space science research at ukm toward space weather initiative.  - the 1st aoswa workshop.  . 

mustafa dh. hassib, js mandeep, mardina abdullah, mahamod ismail, rosdiadee nordin and mt islam.  (2012).  improved concatenated (rs-cc) for ofdm systems.  - ieice electronics express.  9(6):538-543. 

ibrahim y sokar, md yusoff jamaluddin, mardina abdullah, zayed alarabi khalifa.  (2011).  kpis target adjustment based on trade-off evaluation using fuzzy cognitive maps.  - australian journal of basic and applied sciences.  5(12):2048-2053. 

mahamod ismail, mardina abdullah, wayan suparta, and duratul ain yahya.  (2011).  2011 ieee international conference on space science and communication (iconspace) proceeding.  - 2011 ieee international conference on space science and communication (iconspace) proceeding.  . 

jit singh mandeep, anthony cheng chen yee, mardina abdullah and mohammad tariqul islam.  (2011).  tropospheric scintillation measurements in ku-band satellite signals on earth-space paths with low elevation angle.  - idojaras.  115(4):265-273. 

cheng chen yee, js mandeep, m abdullah, m tariqul.  (2011).  weather data processing for tropospheric scintillation analysis for year 2008 and 2009.  - regional engineering postgraduate conference 2011, universiti kebangsaan malaysia.  . 

mardina abdullah.  (2011).  pemantauan suar matahari.  - dewan kosmik.  . 

siti sarah nik zulkifli, mardina abdullah, mahamod ismail.  (2011).  simulation of ionospheric error on gps signals due to changes in the direction of mobile station positions in differential gps.  - annals of geophysics.  54(6):756-760. 

mohd raihan taha, baba mohd. deros, zahira yaacob, shahrom abdullah, n. e. shanmugam, siti kartom kamaruddin, zamri chik, mardina abdullah, wardah fatimah mohd yusoff, nangkula utaberta, ahmad ashrif a. bakar, aida baharuddin, arif mohd sham.  (2011).  jurnal kejuruteraan.  - jurnal kejuruteraan.  1-68. 

t.v omotosho, j. s. mandeep and m.abdullah.  (2011).  atmospheric gas impact on fixed satellite communication link a study of its effects at ku, ka and v bands in nigeria.  - proceeding of the 2011 ieee international conference on space science and communication (iconspace).  . 

js mandeep, ooi wen hui, m abdullah, m tariqul, m ismail, w suparta, baharudin yatim, p. susthitha menon, h. abdullah.  (2011).  modified itu-r rain attenuation model for equatorial climate.  - 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena", iconspace 2011; penang.  . 

anthony cheng chen yee, js mandeep , m abdullah, m tariqul, m ismail, w suparta , baharudin yatim, h abdullah.  (2011).  development of new tropospheric scintillation prediction model for country in tropical climate.  - 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena", iconspace 2011; penang.  . 

mardina abdullah.  (2011).  suar matahari:bila-bila masa.  - dewan kosmik.  . 

mardina abdullah.  (2011).  suar matahari: letupan terbesar dalam sistem suria.  - dewan kosmik.  . 

m. abdullah, j.s. mandeep, s. zainuddin, s. abdullah and a.f.m. zain.  (2011).  variation of fof2 prior to earthquakes.  - journal of metrology society of india.  26(2):97-103. 

j.s. mandeep, anthony cheng chen yee, m. abdullah, m tariqul.  (2011).  comparison and analysis of tropospheric scintillation models for northern malaysia.  - acta astronautica.  69(1-2):2-5. 

asnawi husin, m. abdullah, m. a. momani.  (2011).  observation of medium-scale traveling ionospheric disturbances over peninsular malaysia based on ipp trajectories.  - radio science.  46(2):RS2018. 

rizal munadi, mahamod ismail, mardina abdullah, norbahiah misran.  (2011).  location management cost strategies in cellular networks.  - int. j. comp. tech. appl.  2(1):188-192. 

mardina abdullah, siti aminah bahari, asnawi.  (2011).  development of ionospheric studies in malaysia particularly in ukm - the national university of malaysia.  - international southeast asia low0latitude ionospheric observation network symposium 2011.  . 

asnawi and mardina abdullah.  (2011).  tec variation duringlow solar activity : a preliminary result of ionosphere tec monitoring using gps over ukm bangi, malaysia.  - international southeast asia low-latitude ionospheric observation network symposium 2011.  . 

mardina abdullah, badariah bais & azah mohamed.  (2011).  pembangunan awal sistem pemantauan projek kerja kursus sarjana.  - prosiding kongres pengajaran & pembelajaran ukm 2011 / ukm.  . 

b. voon pai, w.a.w.z. abidin, h. zen, t. masri, a. k. othman, m. abdullah.  (2011).  ionospheric total electron content modelling using gps in equatorial region.  - proceedings of encon2011 4th engineering conference, kuching, sarawak, malaysia..  . 

suhaila m buhari, mardina abdullah, alina marie hasbi.  (2011).  the investigation of plasma bubbles occurrence in the equatorial, and middle latitude region associated with space weather events.  - seminar penyelidikan siswazah angkasa (spsa 2011).  . 

abushagur, aag; abbou, fm; abdullah, m; misran, n.  (2011).  performance analysis of a free-space terrestrial optical system in the presence of absorption, scattering, and pointing error.  - optical engineering.  50(7):075007. 

aramesh seif, mardina abdullah, alina marie hasbi.  (2011).  investigation of ionospheric scintillation using gps sensing.  - seminar penyelidikan siswazah angkasa (spsa 2011).  . 

m. m. salut, k. k. m. shariff, mardina abdullah.  (2011).  investigation of the d-region ionosphere characteristics using tweek sferics at low latitudes.  - seminar penyelidikan siswazah angkasa (spsa 2011).  . 

m. m. salut, mardina abdullah.  (2011).  observation of early vlf perturbations at malaysia.  - indo-us workshop on advancing vlf science through the global awesome network.  . 

intan izafina idrus, mardina abdullah, alina marie hasbie, asnawi husin.  (2011).  detection of large scale travelling ionospheric disturbances using myrtknet data.  - epc 2011 regional engineering postgraduate conference 2011, ukm, bangi, selangor d.e.  . 

ibrahim y sokar, mardina abdullah, md. yusoff jamaluddin.  (2011).  analyzing trade-off issues among key performance indicators using fuzzy cognitive maps.  - epc 2011 regional engineering postgraduate conference 2011, ukm, bangi, selangor d.e.  . 

temidayo victor omotosho, jilt singh mandeep and mardina abdullah.  (2011).  cloud-cover statistics and cloud attenuation at ka-and v-bands for satellite systems design in tropical wet climate.  - ieee antenna and wireless propagation letters.  10:1194-1196. 

wayan suparta, faizatul noor abu bakar, mardina abdullah.  (2011).  detection of coreless winter in bipolar regions using gps pwv observation.  - fifth malaysia international seminar on antarctica (misa5).  . 

mardina abdullah, siti aminah bahari, azami zaharim, ahmad faizal mohd zain, siti nor afzan abdul habib and cheak bi yi.  (2011).  forecasting of ionospheric delay using the holt-winters method.  - xxx ursi general assembly and scientific symposium of international union of radio science.  . 

siti aminah bahari, mardina abdullah, alina marie hasbi and baharudin yatim.  (2011).  diurnal, seasonal and geographic location effects on tec variation over malaysia.  - xxx ursi general assembly and scientific symposium of international union of radio science.  . 

siti aminah bahari, mardina abdullah and baharudin yatim.  (2011).  the response of tec at quasi-conjugate point gps stations during solar flares.  - acta geophysica.  59(2): 407-427. 

faizatul noor abu bakar, wayan suparta, mardina abdullah.  (2011).  the gps signals affected by the 2010 eyjafjallajökull eruption: an abundant of atmospheric water vapor studies.  - fifth malaysia international seminar on antarctica (misa5).  . 

mardina abdullah, siti sarah nik zulkifli dan mahamod ismail.  (2011).  kesan perubahan tec, profil ionosfera dan arah kedudukan stesen penerima terhadap ralat ionosfera isyarat gps.  - jurnal kejuruteraan.  23:27-36. 

abba, i., abidin, w.a.w.z., othman, a.k., ping, k.h., abdullah, m., pai, b.v..  (2011).  best position method for experimental data acquisition systems using low-cost gps receiver.  - 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena",iconspace 2011; penang.  . 

shariff, k.k.m., salut, m.m., abdullah, m., graf, k.l..  (2011).  investigation of the d-region ionosphere characteristics using tweek atmospherics at low latitudes.  - 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena", iconspace 2011; penang.  . 

munadi, r., ismail, m., abdullah, m., misran, n..  (2011).  location management cost reduction using fuzzy logic in cellular radio network.  - 2011 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena", iconspace 2011; penang.  . 

suryadi, abdullah, m., husain, h..  (2011).  prediction of vlf propagation signal jji japan disturbed by lightning using artificial neural networks: preliminary results.  - 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena", iconspace 2011; penang.  . 

seif a., abdullah m., hasbi a.m., zou y..  (2011).  observation of gps ionospheric scintillation at ukm, malaysia.  - 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena", iconspace 2011; penang.  . 

pai b.v., abidin w.a.w.z., zen h., masri t., abdullah m..  (2011).  open space mathematical model for the mobile satellite l-band signal in sarawak using global positioning system technology.  - 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena", iconspace 2011; penang.  . 

abdullah m., abdullah s., bahari s.a., asnawi, suparta w., zain a.f.mohd., kadokura a., bjornsson g..  (2011).  tec variations at gps stations over high-latitude and at the equatorial region.  - 2011 ieee international conference on space science and communication: "towards exploring the equatorial phenomena", iconspace 2011; penang.  . 

s. bohanudin, m. ismail, m. abdullah.  (2010).  location determination technologies in low hearability for third generation cellular system and beyonds.  - regional engineering postgraduate conference (epc) 2010, universiti kebangsaan malaysia.  . 

riri darwanisari didong, mohammad awad momani, mardina abdullah.  (2010).  the behavior of ionospheric total electron content during annular solar eclipse on 15th january 2010.  - regional engineering postgraduate conference (epc) 2010, universiti kebangsaan malaysia.  . 

suryadi, m. abdullah, h. husain.  (2010).  measured early/fast event using vlf line receiver at ukm site.  - regional engineering postgraduate conference (epc) 2010, universiti kebangsaan malaysia.  . 

m.m. salut, m. abdullah.  (2010).  vlf monitoring of subionospheric perturbations observed at malaysia.  - seminar penyelidikan siswazah angkasa (spsa) 2010, universiti kebangsaan malaysia.  . 

suryadi, m. abdullah, h. husain.  (2010).  observation of sferic effect on vlf signal propagation using line receiver at ukm malaysia.  - seminar penyelidikan siswazah angkasa (spsa) 2010, universiti kebangsaan malaysia.  . 

w.a. mubarak, m. abdullah, n. misran, a.m. hasbi.  (2010).  study of the ionospheric tec variations prior to strong earthquakes in the sumatra region.  - seminar penyelidikan siswazah angkasa (spsa) 2010, universiti kebangsaan malaysia.  . 

asnawi, m. abdullah, m.a. momani.  (2010).  analisis variasi tec terhadap kejadian gangguan ionosfera bergerak skala sederhana.  - seminar penyelidikan siswazah angkasa (spsa 2010), universiti kebangsaan malaysia.  . 

a. seif, m. abdullah, a.m. hasbi.  (2010).  observation of ionospheric scintillation activity during quiet and disturbed days.  - seminar penyelidikan siswazah angkasa (spsa 2010), universiti kebangsaan malaysia.  . 

f. n. a. bakar, w. suparta, m. abdullah, n. h. a. aziz.  (2010).  response of ozone holes on gps pwv during antarctic winter in 2009.  - seminar penyelidikan siswazah angkasa (spsa) 2010.  . 

wayan suparta, faizatul noor abu bakar, mardina abdullah.  (2010).  impact of the 2010 icelandic eyjafjallajökull volcanic eruptions on the gps signals.  - 2010 international conference on environmental and engineering applications (iceea 2010).  . 

wayan suparta, faizatul noor abu bakar , mardina abdullah, akira kadokura, natsuo sato and gunnlaugur bjornsson.  (2010).  observations of gpw pwv variability during the sequence of 2010 eyjafjallajökull eruption.  - the 33rd symposium on polar meteorology and glaciology.  . 

mardina abdullah, d.a.a. mat dan s.s.n. zulkifli.  (2010).  perbandingan jumlah kandungan elektron di atas variasi longitud khatulistiwa dan latitud menggunakan model iri, nequick dan data ionex.  - journal of the institution of engineers, malaysia.  71(2):9-17. 

mardina abdullah, norbahiah misran & nor nadira mohammad ariff.  (2010).  penentuan ralat multipath bagi data cerapan gps julat pseudo di stesen rujukan rtk (real time kinematic) di malaysia.  - jurnal kejuruteraan.  22:31-42. 

mardina abdullah, dayang azra awang mat, ahmad faizal mohd zain, sabirin abdullah, asnawi & siti sarah nik zulkifli.  (2010).  jumlah kandungan elektron sewaktu gangguan ionosfera bergerak di parit raja, johor.  - jurnal kejuruteraan.  22:23-30. 

mohd raihan taha, zahira yaacob, shahrom abdullah, amiruddin ismail, zuhairuse md. darus, siti kartom kamaruddin, baba mohd deros, badariah bais, zamri chik, muhammad farihan irfan mohd nor, mardina abdullah, aida baharuddin & arif mohd sham.  (2010).  jurnal kejuruteraan.  - jurnal kejuruteraan.  1-113. 

f. n. a. bakar, w. suparta, m. abdullah, n. h. a. aziz.  (2010).  troposheric ash response on gps pwv during the 2010 eyjafjallajökull eruption.  - regional engineering postgraduate conference (epc) 2010, universiti kebangsaan malaysia.  . 

mardina abdullah, norbahiah misran, nor nadira m. ariff dan m. fazrin abdullah.  (2010).  perbandingan ralat `multipath` bagi data cerapan gps stesen mass dan stesen rtk.  - jurnal kejuruteraan.  22:11-22. 

y. norsuzila, m. abdullah, m. ismail, m. ibrahim, z. zakaria.  (2010).  total electron content (tec) and estimation of positioning error using malaysia data.  - proceedings of the world congress on engineering 2010 vol i wce 2010, june 30 - july 2, 2010, london, u.k..  . 

m. abdullah, h.j. strangeways, s.s.n. zulkifli.  (2010).  ionospheric differential error determination using ray tracing for a short baseline.  - advances in space research.  46:1326-1333. 

mardina abdullah.  (2010).  satelit navigasi gps: teknik penjejakan pintar.  - dewan kosmik.  . 

norsuzila yaacob, mardina abdullah and mahamod ismail.  (2010).  trends in telecommunications technologies.  - .  485-508. 

j. s. mandeep & y. y. ng & h. abdullah & m. abdullah.  (2010).  the study of rain specific attenuation for the prediction of satellite propagation in malaysia.  - journal of infrared, millimeter, and terahertz waves.  31(6):681-689. 

mardina abdullah.  (2010).  characterization of polar-equatorial geospace.  - prosiding seminar pemantauan projek penyelidikan gup 2008, pusat pengurusan penyelidikan dan inovasi (crim).  . 

mandeep jit singh, mardina abdullah, baharudin yatim, mahamod ismail and wayan suparta.  (2010).  satellite communication.  - .  253-281. 

mohammad m.p. salut, mardina abdullah and kevin l. graf.  (2010).  detecting subionospheric early vlf perturbations at malaysia.  - asia-pacific symposium on applied electromagnetics and mechanics 2010 (apsaem 2010).  . 

asnawi, m. abdullah,m.a momani.  (2009).  analysis of tec variation with the occurrence of medium scale travelling ionospheric disturbance (mstid).  - seminar penyelidikan siswazah angkasa (spsa 2009), pulau tioman, pahang, malaysia.  . 

khairi abdul rahim, mahamod ismail, mardina abdullah.  (2009).  satellite link margin prediction and performance of astro malaysia.  - proceeding of the 2009 international conference on space science and communication, 26-27 october 2009, port dickson, negeri sembilan, malaysia.  . 

asnawi, m. abdullah, m.a momani.  (2009).  analysis of tec variation with the occurrence of medium scale travelling ionospheric disturbance (mstid).  - regional engineering postgraduate conference (epc) 2009 / faculty of engineering and build environment.  . 

m. abdullah, a.f.m. zain, y.h. ho and s. abdullah.  (2009).  tec and scintillation study of equatorial ionosphere: a month campaign over sipitang and parit raja stations, malaysia.  - american journal of engineering and applied sciences.  2(1):44-49. 

m. abdullah, a. zaharim, a.f.m. zain, s. abdullah, s.a. bahari, s.n.a.a. habib.  (2009).  forecasting of ionospheric delay obtained from gps observations using holt-winter method.  - european journal of scientific research.  37(3):471-480. 

norsuzila ya`acob, mardina abdullah, mahamod ismail, kamaruzaman jusoff.  (2009).  ionospheric correction and ambiguity resolution in dgps with single frequency.  - applied physics research (apr).  1(2):83-91. 

mardina abdullah, norbahiah misran, nurul shazana abdul hamid, syuhaila mustafa, noor shuhaira rejab, mohd azlan shah jaafar, tuan nuramalina tuan ali.  (2009).  prosiding seminar penyelidikan siswazah angkasa.  - prosiding seminar penyelidikan siswazah angkasa, 6-8 ogos 2009, berjaya tioman beach resort, pulau tioman, pahang (isbn: 97808344827).  . 

m. a. momani, b. yatim, m. a. m. ali, m. abdullah.  (2009).  observation of travelling ionospheric disturbances during storm events over antarctica.  - asm science journal.  121-130. 

asnawi, m. abdullah, m.a momani.  (2009).  medium scale travelling ionospheric disturbance detection using gps myrtknet.  - proceeding of the 2009 international conference on space science and communication, 26-27 october 2009, port dickson, negeri sembilan, malaysia.  . 

suryadi, mardina abdullah, hafizah husain.  (2009).  prediction of vlf propagation disturbance the associated with lightning discharge using artificial neural network.  - seminar penyelidikan siswazah angkasa (spsa 2009), pulau tioman, pahang, malaysia.  . 

fares sayadi, mahamod ismail, norbahiah misran, kasmiran jumari,mardina abdullah.  (2009).  detection algorithm development for 4g applications: mimo mc-cdma communication system.  - seminar penyelidikan siswazah angkasa (spsa 2009), pulau tioman, pahang, malaysia.  . 

widdy aulia mubarak, mardina abdullah, norbahiah misran.  (2009).  kajian ionosfera terhadap gempa bumi menggunakan data gps dan pengesan digisonde.  - seminar penyelidikan siswazah angkasa (spsa 2009), pulau tioman, pahang.  . 

siti sarah nik zulkifli, mardina abdullah, mahamod ismail, and ahmad faizal mohd zain.  (2009).  comparison of ionospheric delays between 3d ray-tracing and gps-tec measurements.  - 2009 international symposium on gps/gnss, international convention center jeju, south korea.  . 

mardina abdullah, siti aminah bahari, and baharudin yatim.  (2009).  variations of tec over different regions during ionospheric storms.  - 2009 international symposium on gps/gnss, international convention center jeju, south korea.  . 

siti aminah bahari, mardina abdullah, baharudin yatim.  (2009).  the variations of tec map over different regions.  - seminar penyelidikan siswazah angkasa (spsa 2009), pulau tioman, pahang..  . 

norsuzila ya`acob, mardina abdullah and mahamod ismail.  (2009).  ionospheric delay model and application for precise positioning.  - seminar penyelidikan siswazah angkasa (spsa 2009), pulau tioman, pahang, malaysia.  . 

norsuzila ya`acob, mardina abdullah and mahamod ismail.  (2009).  multipath mitigation from gps carrier phase observations using wavelet technique.  - masaum journal of basic and applied sciences.  1(3):426-430. 

norsuzila ya`acob, mardina abdullah and mahamod ismail.  (2009).  determination of gps total electron content (tec) at ionosphere layer using malaysian data.  - masaum journal of basic and applied sciences.  1(3):431-435. 

mardina abdullah.  (2009).  aurora: cahaya yang menakjubkan.  - dewan kosmik.  . 

norsuzila ya`acob, mardina abdullah dan mahamod ismail.  (2009).  malaysia precise positioning.  - coordinates.  . 

ya`acob, n; abdullah, m; ismail, m
.  (2009).  multipath mitigation of global positioning system (gps) signal using wavelet technique.  - international conference on digital image processing (icdip 2009)/ bangkok, thailand.  . 

norsuzila ya`acob, mardina abdullah dan mahamod ismail.  (2009).  gps vertical total electron content (tec) dual frequency technique and map at ionosphere layer using malaysian data.  - international conference on future computer and communication (icfcc 2009)/ kuala lumpur, malaysia.  . 

norsuzila ya`acob, mardina abdullah, mahamod ismail dan azami zaharim.  (2009).  model validation for gps total electron content using 10th polynomial function technique at an equatorial region.  - wseas transactons on computers.  8(9):1533-1542. 

shahrir abdullah, norhamidi muhamad, riza atiq abdullah o.k. rahmat, baba md. deros, noorhisham tan kofli,mardina abdullah, mazlan mohd. tahir, andanastuti muchtar.  (2009).  penilaian objektif dan hasil program pendidikan berasaskan hasil (obe): soal selidik majikan industri dan alumni.  - asean journal of teaching and learning in higher education.  1(2):1-8. 

asnawi, m. abdullah, m.a momani.  (2009).  observation of medium scale travelling ionospheric disturbance using gps suger.  - 2009 international conference on electrical engineering and informatics 5-7 august 2009, selangor, malaysia.  . 

mardina abdullah.  (2009).  mengesan pratanda gempa bumi.  - dewan kosmik.  . 

mardina abdullah.  (2009).  gps penjejak cerdik.  - dewan kosmik.  . 

mardina abdullah.  (2009).  cuaca di angkasa lepas.  - dewan kosmik.  . 

muhammad saadi, mardina abdullah.  (2009).  development of tec map over equatorial anomaly using gps data.  - international journal of college science in india (ijcsi).  3:24-36. 

m. abdullah, a.f.m. zain, m.h. jusoh, n. misran and w.a. mubarak.  (2009).  ionospheric total electron content response to the december 26, 2004 north sumatra earthquake.  - american journal of applied sciences.  6(4):685-690. 

mardina abdullah, hal j. strangeways, david m. a. walsh.  (2009).  improving ambiguity resolution rate with an accurate ionospheric differential correction.  - journal of navigation.  62(1):151-166. 

siti aminah bahari, mardina abdullah, baharudin yatim.  (2009).  variations of ionospheric tec at geomagnetic conjugate points during solar minimum.  - proceeding of the 2009 international conference on space science and communication, 26-27 october 2009, port dickson, negeri sembilan, malaysia.  . 

ya`acob n., abdullah m., ismail m., zaharim a..  (2009).  improving ambiguity resolution using an ionospheric differential correction.  - european journal of scientific research.  29(1):6-12. 

ya`acob n., abdullah m., ismail m., zaharim a..  (2009).  model validation for total electron content (tec) at an equatorial region.  - european journal of scientific research.  28(4):643-649. 

abdullah s., rahmat r.a.a.o.k., zaharim a., muhamad n., deros b.m., kofli n.t., abdullah m., mohd. tahir m., muchtar a., azhari c.h..  (2009).  implementing continual review of programme educational objectives and outcomes for obe curriculum based on stakeholders` input.  - european journal of scientific research.  29(1):89-99. 

zulkifli s.s., abdullah m., zaharim a., ismail m..  (2009).  ionospheric effects on gps range finding using 3d ray-tracing and nelder-mead optimisation algorithm.  - wseas transactions on mathematics.  8(1):1-10. 

ya`acob n., abdullah m., mahamod i., zaharim a..  (2009).  model validation for gps total electron content (tec) using 10th polynomial function technique at an equatorial region.  - wseas transactions on computers.  8(9):1533-1542. 

abu bakar mohamad, zahira yaacob, shahrom abdullah, mardina abdullah, amiruddin ismail, zuhairuse md. darus, siti kartom kamaruddin, baba mohd deros, badariah bais, zamri chik, muhammad farihan irfan mohd nor, aida baharuddin.  (2009).  jurnal kejuruteraan.  - jurnal kejuruteraan.  1-116. 

ng yoke wei, siti aminah bahari, mardina abdullah, baharudin yatim.  (2009).  regional ionosphere maps over malaysia during solar minimum.  - proceeding of the 2009 international conference on space science and communication, 26-27 october 2009, port dickson, negeri sembilan, malaysia.  . 

fares sayadi, mahamod ismail, norbahiah misran, kasmiran jumari and mardina abdullah.  (2009).  efficient detection algorithm for a multiple-input and multiple-output multiuser multi-carrier code division multiple access in time-varying channels.  - american j. of engineering and applied sciences.  2(4):635-643. 

widdy aulia mubarak, mardina abdullah, norbahiah misran.  (2009).  ionospheric tec response over simeulue earthquake of 28 march 2005.  - proceeding of the 2009 international conference on space science and communication, 26-27 october 2009, port dickson, negeri sembilan, malaysia.  . 

w. suparta, f. n. a. bakar, m. abdullah, n. sato, a. kadokura, g. bjornsson.  (2009).  monitoring of gps pwv variability at bipolar conjugate points.  - proceeding of the 2009 international conference on space science and communication, 26-27 october 2009, port dickson, negeri sembilan, malaysia.  . 

wayan suparta, mardina abdullah, baharudin yatim, mohd alauddin mohd ali.  (2009).  upper-lower atmospheric coupling observation at arctic keyhole for advancement global climate change model.  - international seminar on "climate change impacts on water resources and coastal management in developing countries".  . 

suryadi, mardina abdullah, hafizah husain, hee teck siang.  (2009).  development of vlf receiver for remote sensing of low atmospheric activities.  - proceeding of the 2009 international conference on space science and communication, 26-27 october 2009, port dickson, negeri sembilan, malaysia.  . 

wayan suparta, mardina abdullah, baharudin yatim, mohd alauddin mohd ali, akira kadokura, gunnlaugur bjornsson.  (2009).  the first measurements of lower and upper levels of the atmosphere using gps sensing during the september 2008 campaign at husafell, iceland, north pole.  - 4th malaysian international seminar on antarctica (misa4).  . 

wayan suparta, mardina abdullah, mohd alauddin mohd ali, baharudin yatim, natsuo sato, akira kadokura, gunnlaugur bjornsson, grahame j. fraser.  (2009).  solar-terrestrial observations at bipolar conjugate points using global positioning system.  - international conference on instrumentation, communications, information technology and biomedical engineering (icici-bme) 2009.  . 

fares sayadi, mahamod ismail, norbahiah misran, kasmiran jumari, mardina abdullah.  (2009).  an efficient hybrid detection algorithm for a full rate quasi-orthogonal prolonged mimo mc-cdma systems.  - proceeding 2009 ieee 9th malaysia international conference on communication (micc 2009), kuala lumpur malaysia.  . 

norsuzila, y., m. abdullah and m. ismail.  (2009).  improving ambiguity resolution for short and medium baseline with an accurate ionospheric modelling.  - the online journal on electronics and electrical engineering (ojeee).  1(1):58-62. 

abu bakar mohammad, amiruddin ismail, aini hussain, zahira yaakob, siti kartom kamarudin, baba md. deros, che hassan che haron, zuhairuse md. darus, abdul halim ismail, mardina abdullah, noor ezlin ah.  (2008).  jurnal kejuruteraan jilid 19, 2007.  - jurnal kejuruteraan 2007.  19(2007) :1-198. 

norsuzila y., m. abdullah, m. ismail and a. zaharim.  (2008).  total electron content (tec) and model validation at an equatorial region.  - proceeding of the 13th wseas international conference on applied mathematics (math`08), puerto de la cruz, tenerife, canary islands, spain. issn:1790-2769,isbn: 978-960-474-034-5.  . 

mardina abdullah, norbahiah misran, muhamad fazrin abdullah.  (2008).  penentuan ralat multipath bagi data cerapan gps stesen mass, jupem.  - the malaysian surveyor- the profesional journal of the institution of surveyor malaysia.  43(4):19-25. 

mardina abdullah, ahmad faizal mohd zain, sabirin abdullah, nurbaya mohd hashim, ho yih hwa.  (2008).  penentuan gangguan ionosfera bergerak menggunakan data gps.  - jurnal teknologi.  47(D): 121-130. 

abdullah, m., h. j. strangeways, and d. m. a. walsh.  (2008).  extracting ionospheric delay and advance of gps signals from appleton - lassen dispersion.  - 2nd asian physics symposium 2007(aps2007), itb-institut teknologi bandung, bandung, indonesia.  . 

siti aminah bahari, mardina abdullah, baharudin yatim.  (2008).  ionosphere maps during minor geomagnetic disturbances obtained from gps observations.  - proceedings of 2008 student conference on research and development (scored 2008). 26-27 nov. 2008, johor, malaysia. isbn :978-1-4244-2869-4..  . 

m. rizal, m. ismail, m. abdullah, and n. misran.  (2008).  the impact of user mobility in personal communication service network.  - the 3rd imt-gt regional conference on mathematics, statistics and applications, universiti sains malaysia..  . 

mohammad awad momani, baharudin yatim, mohamad alauddin mohd ali, mardina abdullah and sumazly sulaiman.  (2008).  the impact of storm enhanced density on the gps measurements at conjugate points during storm periods.  - nriag journal of geophysics.  Special Issue:251-266. 

mohammad awad momani, baharudin yatim, mohamad alauddin mohd ali, mardina abdullah and sumazly sulaiman.  (2008).  the impact of storm enhanced density on the gps measurements at conjugate points during storm periods.  - the 1st arab conference on astronomy and geophysics. hellwan-egypet / cairo.  . 

wayan suparta, mohd. alauddin mohd. ali, baharudin yatim, mardina abdullah and norbahiah misran.  (2008).  first monitoring of precipitable water vapour and ionospheric tec over ukm bangi malaysia by ground-based gps receivers.  - ies2008/ursi.  . 

somayeh resvani, norbahiah misran, mohd. alauddin mohd. ali, mardina abdullah, wayan suparta and sumazly sulaiman.  (2008).  conjugacy effects of ionospheric tec at high latitude stations during october 2003.  - scar/iasc ipy open science conference.  . 

asnawi, m. abdullah, m.a. momani, a.f.m. zain, s.a. bahari, sabirin.  (2008).  mapping tec using regional model and comparison with igs and iri2007.  - student conference on research and development (scored 2008), 26-27 nov. 2008, johor, malaysia. isbn : 978-1-4244-2869-4..  . 

norsuzila y., m. abdullah m. ismail and s.s.n. zulkifli.  (2008).  variation of elevation angle and total electron content (tec) and profile shape using modified jones 3d ray tracing for differential global positioning system (dgps) in equatorial.  - 2008 ieee international rf & microwave conference (rfm08), kuala lumpur, malaysia.  . 

norsuzila y., m. abdullah and m. ismail.  (2008).  an accurate ionospheric modelling for ambiguity resolution for short baseline.  - 10th industrial electronics seminar 2008 (eepis its), surabaya, indonesia.  . 

mat, d.a.a., m. abdullah, n. misran, s. suhaili, and a. joseph.  (2008).  reliability of tec over equatorial`s region due to the seasonal changes.  - proc. international conference on environmental research and technology,icert(2008), usm, penang.  . 

mardina abdullah.  (2008).  ionosfera: lapisan atmosfera berelektron bebas.  - dewan kosmik.  . 

zulkifli, s.s.n., m. abdullah, and m. ismail.  (2008).  application of the nelder-mead optimization in ray-tracing in the determination of satellite location.  - 8th wseas international conference on simulation, modelling and optimization in ray-tracing in the determination of satellite location (smo '08), santander, cantabria, spain.  . 

abdullah, m., s.a. bahari, and y.w. ng.  (2008).  an assesment of gps rtk observations data in mapping the ionosphere over malaysia.  - the 7th seminar on science and technology 2008 (snt2008), school of science and technology, universiti malaysia sabah, labuan, sabah, 2008..  . 

abdullah, m., s.a. bahari, s.s.n. zulkifli, and a.s. anas.  (2008).  peta ionosfera ketika ribut geomagnetik di malaysia.  - the 7th seminar on science and technology 2008 (snt2008), school of science and technology, universiti malaysia sabah, labuan, sabah.  . 

mardina abdullah, ahmad faizal mohd zain, norbahiah misran, and andrew ong yee jack.  (2008).  pembinaan sistem datalogging untuk alat penerima gps satelit satu frekuensi.  - jurnal kejuruteraan (terbitan 2007, cetakan untuk 2008).  19:87-100. 

sarah, s., m. abdullah, and m. ismail.  (2008).  ionospheric delay on the gps signals due to the tec variation.  - engineering postgraduate conference 2008, epc08, faculty of engineering & built environment.  . 

mubarak, w., m. abdullah, and n. misran.  (2008).  total electron content variation before the sumatra earthquake of 12 september 2007.  - engineering postgraduate conference 2008, epc08, faculty of engineering & built environment.  . 

mardina abdullah.  (2008).  research activities on ionospheric studies in ukm.  - seminar sbas, agensi angkasa negara.  . 

bahari, s.a., m. abdullah, and b. yatim.  (2008).  tec variations for quiet ionosphere over ukm's gps station.  - engineering postgraduate conference 2008, epc08, faculty of engineering & built environment.  . 

abushagur, a.a.g., f.m. abbou, m. abdullah, and n. misran.  (2008).  free space optical communication system performance in the presence of pointing error.  - engineering postgraduate conference 2008, epc08, faculty of engineering & built environment.  . 

rezvani, s., n. misran, m.a.m. ali, m. abdullah, w. suparta, s. sulaiman, and m.a. momani.  (2008).  determination of geomagnetic strom effects on the ionospheric variability from gps observations at high latitude conjugate stations.  - 7th international symposium and exhibition on geoinformation, isg2008, kliuc- kuala lumpur inftrasturcture university college.  . 

shahrir abdullah, riza atiq abdullah o.k. rahmat, azami zaharim, norhamidi muhamad, baba md. deros, noorhisham tan kofli, mardina abdullah, mazlan mohd. tahir, andanastuti muchtar and che husna azhari.  (2008).  implementing continual review of programme educational objectives and outcomes for obe curriculum based on stakeholders? input.  - proceedings of the 7th wseas international conference on education and educational technology (edu`08).  . 

abdullah, m., s.a. bahari, and b. yatim.  (2008).  an assessment of ppp technique of gps observation for ionospheric mapping.  - 7th international symposium and exhibition on geoinformation, isg2008, kliuc- kuala lumpur inftrasturcture university college.  . 

mubarak, w., m. abdullah, and n. misran.  (2008).  total electron content variability during the bengkulu earthquake of 12 september 2008.  - 7th international symposium and exhibition on geoinformation, isg2008, kliuc- kuala lumpur inftrasturcture university college.  . 

abdullah, m., m. ismail, y. norsuzila, and n.n.m. arifff.  (2008).  evaluation of multipath error on gps signal at malaysia station, in , pp. 1-13,.  - 7th international symposium and exhibition on geoinformation, isg2008, kliuc- kuala lumpur inftrasturcture university college.  . 

norsuzila, y., m. abdullah and m. ismail.  (2008).  leveling process of total electron content (tec) using malaysian global positioning system (gps) data.  - american j. of engineering and applied sciences.  1(3):223-229. 

k. singh, m. ismail, k. jumari, m. abdullah and k. mat.  (2008).  development of universal intelligent positioning system techniques in universal mobile telecommunications system networks.  - journal of applied sciences.  8(13):2412-2419. 

norsuzila ya`acob, mardina abdullah and mahamod ismail.  (2008).  determination of gps total electron content using single layer model (slm) ionospheric mapping function.  - international journal of computer science and network security (ijcsns).  8(9):154-160. 

noorazuan md hashim, mardina abdullah, mohd ekhwan toriman.  (2008).  sumber ralat gps dan implikasinya dalam kajian sekitaran.  - international conference on social, development and environmental studies 2008.  . 

abdullah, m., s.a. bahari, b. yatim, a. zaharim, and a.m. razali.  (2008).  application of spherical harmonics in determination of tec using gps observable.  - the 3rd international conference on mathematics and statistics (icoms-3),institut pertanian bogor, indonesia.  . 

abdullah, m., s.s.n. zulkifli, b. ismail, a.m. razali, and a. zaharim.  (2008).  determination of gps signal path using the runge-kutta method.  - the 3rd international conference on mathematics and statistics (icoms-3, institut pertanian bogor, indonesia.  . 

zaharim, a., m. abdullah, a.f.m. zain, s. abdullah, s.a. bahari, and s.n.a.a. habib.  (2008).  application of the holt-winter method in forecasting ionospheric delay.  - proceedings of the 9th islamic countries conference on statistical sciences 2007 iccs-ix. isbn 978-983-4307-1-1.  . 

norsuzila, y., m. abdullah, and m. ismail.  (2008).  investigation of ambiguity resolution for single and dual frequency relative positioning..  - 4th international colloquium on signal processing and its application, uitm,k. lumpur, malaysia.  . 

norsuzila, y., m. abdullah, and m. ismail.  (2008).  the low-latitude ionosphere: modelling of ionospheric effects on relative gps measurements.  - 6th international conference on electrical engineering, iceeng 2008, cairo, eqypt, 2008..  . 

zain, a.f.m., s. abdullah, m.j. homam, f.c. seman, m. abdullah, and y.h. ho.  (2008).  observations of the f3-layer at equatorial region during 2005. ..  - journal of atmospheric and solar-terrestrial physics.  70(6):918-925. 

abu bakar mohamad, zahira yaacob, shahrum abullah, mardina abdullah, amiruddin ismail, zuhairuse md. darus, siti kartom kamarudin, baba md deros, badariah bais, zamri chik, muhammad farihan irfan mohd nor, jaharah nordin.  (2008).  jurnal kejuruteraan.  - jurnal kejuruteraan.  1-234. 

noorazuan md hashim, mardina abdullah, mohd ekhwan toriman & sharifah mastura s.a.  (2008).  sumber ralat gps dan imlikasinya dalam kajian sekitaran.  - international conference on social, development and environmental studies 2008.  . 

mohammad awad momani, mohd alauddin mohd ali, baharudin yatim, mardina abdullah and norbahia misran.  (2008).  gps observations at quasi-conjugate points under disturbed conditions.  - acta geophysica.  56(4):1179-1201. 

norsuzila ya`acob, mardina abdullah, mahamod ismail and azami zaharim.  (2008).  improved ambiguity resolution by an equatorial ionospheric differential correction for precise positioning.  - proceeding of the 13th wseas international conference on applied mathematics (math`08), puerto de la cruz, tenerife, canary islands, spain. issn:1790-2769,isbn: 978-960-474-034-5.  . 

abdullah, m., s.a. bahari, and b. yatim.  (2008).  tec determination over single gps receiver station using ppp technique.  - international symposium on gps/gnss 2008. tokyo, japan. isbn 978-4-921187-14-3..  . 

abdullah, m., s.s.n. zulkifli, and m. ismail.  (2008).  the effect of ionospheric peculiarities on dgps.  - international symposium on gps/gnss 2008.tokyo, japan..  . 

norsuzila, y., m. abdullah, and m. ismail.  (2008).  application of modified jones 3-d ray tracing program to developed ionospheric delay model.  - international symposium on gps/gnss 2008. tokyo, japan. isbn 978-4-921187-14-3.  . 

norsuzila y., m. abdullah, m. ismail, s. a. bahari and m. k. ismail.  (2008).  ionospheric mapping function for total electron content (tec) using global positioning system (gps) data in malaysia.  - ieee international rf & microwave conference (rfm08), kuala lumpur, malaysia.  . 

muhd fauzi aminuddin shazi shaarani, huda abdullah, mardina abdullah, seri mastura mustaza.  (2008).  proses penambahbaikan dalam pengajaran subjek kkkl 2043 - medan dan gelombang elektromagnet di fakulti kejuruteraan dan alam bina.  - seminar pendidikan kejuruteraan dan alam bina (peka 2008).  . 

zulkifli, s.s.n., m. abdullah, and m. ismail.  (2007).  determination of satellite location or receiver using nelder-mead optimization in ray-tracing.  - regional conference on engineering mathematics, mechanics, manufacturing & architecture (em3arc 2007), putrajaya, malaysia..  . 

abdullah, m., d.a.a. mat, a.f.m. zain, s. abdullah, and s.s.n. zulkifli.  (2007).  analysis of ionospheric models during ionospheric disturbances.  - ieee asia-pacific conference on applied electromagnetics 2007 (apace 2007), melaka, malaysia..  . 

mardina abdullah, md.yusoff jamaluddin dan lee hsien nien.  (2007).  pelaksanaan kajian gerak dan masa dalam industri pembuatan di malaysia.  - journal - the institution of engineers (j. iem).  68 (1): 16 - 21. 

mardina abdullah, hal j. strangeways and david m.a. walsh.  (2007).  effects of ionospheric horizontal gradients on differential gps.  - acta geophysica.  55(4):509-523. 

norsuzila, y., m. ismail, and m. abdullah.  (2007).  investigation of the gps signals ionospheric correction: ionospheric tec prediction over equatorial.  - 14th international conference on telecommunications, 8th malaysian international conference on communication (ict- micc 2007), penang, malaysia.  . 

zulkifli, s.s.n., m. abdullah, and m. ismail.  (2007).  application of 3-d ray-tracing for accurate gps range finding.  - the 5th student conference on research and development,.  . 

abdullah, m., a.f.m. zain, a. zaharim, s.n.a.a. habib, and s.a. bahari.  (2007).  forecasting of ionospheric delay over parit raja station, johor, using statistical method.  - ieee asia-pacific conference on applied electromagnetics proceedings (apace 2007), melaka, malaysia..  . 

m. rizal, m. ismail, and m. abdullah.  (2007).  the evaluation of user mobility behavior in personal communication service network.  - the 5th student conference on research and development, (scored 2007) bangi, malaysia..  . 

shahrir abdullah, norhamidi muhamad, riza atiq abdullah o.k. rahmat, baba md. deros, noorhisham tan kofli, mardina abdullah, mazlan mohd. tahir, andanastuti muchtar.  (2007).  penilaian objektif dan hasil program pendidikan.  - seminar pendidikan kejuruteraan dan alam bina 2007, palace of the golden horses, mines kuala lumpur.  . 

shahrir abdullah, norhamidi muhamad, riza atiq abdullah o.k. rahmat, baba md deros, noorhisham tan kofli , mardina abdullah.  (2007).  penilaian objektif dan hasil program pendidikan berasaskan hasil (obe): soal selidik majikan industri dan alumni.  - seminar pendidikan kejuruteraan dan alam bina (peka 2007).  . 

norsuzila, y., m. ismail and m. abdullah.  (2007).  ionospheric modelling: improving the accuracy of differential gps (dgps) in equatorial regions.  - 2007 asia-pacific conference on applied electromagnetics (apace 2007).  . 

ya`acob n., jusoh m.h., abdullah m., ismail m..  (2007).  monitoring the tec variation using gps dual frequency system during quiet and disturbed day.  - the 5th student conference on research and development (scored 2007), permata, bangi, malaysia..  . 

abdullah, m., a.f.m. zain, s. abdullah, m.h. nurbaya, and m.h. noorazuan.  (2006).  determination of ionospheric disturbances over malaysia.  - proceedings 3rd bangi world conference on environmental management, 5-6 september 2006, bangi, selangor..  . 

mardina abdullah, ahmad faizal mohd zain, norbahiah misran dan desmond koh.  (2006).  pembangunan laman pelayan aktif (active server page) untuk pemaparan maklumat satelit gps.  - journal of industrial technology - sirim.  13(1):101-118. 

muhammad fauzi mohd zain, syarif junaidi sjarifuddin. djalil, nasharuddin zainal, yushaizad yusof, mardina abdullah dan zainuddin sajuri.  (2005).  pendekatan dari sistem pembelajaran universitiuniversiti di jepun ke arah kecemerlangan pelajarpelajar fakulti kejuruteraan ukm-.  - seminar pengajaran & pembelajaran 2005.  .