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. 

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. 

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. 

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. 

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.  - 7th international conference on space science and communication (iconspace).  290-293. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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).  . 

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).  . 

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).  . 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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.  . 

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. 

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.  . 

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. 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. 

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. 

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. 

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. 

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. 

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. 

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. 

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. 

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

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. 

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).  . 

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, 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).  . 

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).  . 

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).  . 

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).  . 

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).  . 

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

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.  . 

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.  . 

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.  . 

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.  . 

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).  . 

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.  . 

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.  . 

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.  . 

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.  . 

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.  . 

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.  . 

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).  . 

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..  . 

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.  .