Suhaila M Buhari

University of Technology Malaysia | UTM · Department of Physics

One of the applications of GPS receiver is to detect and measure the irregularities in satellites communication. Many of the studies conducted the research to analyses the transmission data through ionosphere layers. One of the subjects of the research is scintillation. One of the ionosphere scintillation parameters used for measuring the irregular...

This study investigates the ionospheric response to the December 26, 2019 annular solar eclipse over the southern tip of the Asia region, focusing on Malaysia, Sumatra, and Singapore. Utilizing data from GPS stations and ionosondes along the eclipse path, variations in Total Electron Content (TEC) and ionospheric foF2 pa­ rameters were analysed to...

Equatorial plasma bubbles (EPBs), which are depletions in the ionosphere disrupting radio waves, exhibit complex dynamics influenced by neutral winds. The present study aims to investigate the relationship between the onset of EPBs and the velocities of neutral winds. The onset of EPBs was determined from the rate of the Total Electron Content Inde...

The positioning and navigation accuracy of the Global Positioning System (GPS) is highly affected by ionospheric conditions, especially in the Malaysian region, which is located over the equator, where there are several ionospheric irregularities. Using a dense network of GPS over the Malaysian region, we derived the ionospheric parameter, total el...

This paper presents the detection of the equatorial plasma bubbles (EPB) using the Global Positioning System (GPS) ionospheric tomography method over Peninsular Malaysia. This paper aims to investigate the capability of the GPS ionospheric tomography method in detecting the variations of the EPB over the study area. In doing so, a previous case stu...

The present study aims to investigate the influence of the zonal wind velocity on equatorial plasma bubble (EPB) occurrences over Southeast Asia. The observation of the EPB occurrence is obtained from the GPS Rate of TEC change index. Meanwhile, the zonal winds were measured using a Fabry‐Perot interferometer located at Kototabang and Chiang Mai st...

This paper presents a technique to reconstruct the three-dimensional ionospheric profile to overcome the limitation of the single layer model (SLM) that only focussed on the single height of the ionosphere. This paper is aimed to overcome the limitation of SLM, where a dense network of continuously operating reference station (CORS) Global Position...

The Global Positioning System (GPS) is one of the most important and useful technologies developed for information and communication technology. Propagated wireless signals along the GPS link are affected by the ionospheric irregularities, therefore the GPS signals may experience ionospheric scintillation. In this study, GPS L-band amplitude scinti...

This work investigated the zonal drift velocity, VE, of equatorial plasma bubbles (EPBs) which was calculated from the zonal keogram of the rate of total electron content index obtained using the Global Positioning System data from the Malaysia Real‐Time Kinematics GNSS Network over Southeast Asia across the period 2008 until 2013 (498 nights). In...

This study presents an analysis of the observed north-south asymmetry of the range spread F (RSF) intensity at the low latitude region during an equinoctial month of different solar epochs (2002, 2015 and 2017). The ionospheric parameters were obtained during geomagnetic quiet days from four digisonde stations located along the Brazilian longitude,...

A comparative study of the equatorial spread F occurrence was conducted at different longitudes during 2010 and 2013 representing the low (LSA) and moderate (MSA) solar activity periods respectively. The ionogram data were recorded at low-latitude stations including Jicamarca (JIC;75.76∘ W, 8.17∘ S), Fortaleza (FZA; 38.52∘ W, 3.73∘ S), Ilorin (ILR;...

A study of the zonal velocity variations of equatorial plasma bubbles (EPBs) using the GPS data from Malaysia Real–Time Kinematics GNSS Network (MyRTKnet), IGS and suGAr networks over Southeast Asia during period of February to April 2011, is presented here. This study was carried out based on 49 nights of EPBs zonal velocity which have successfull...

The occurrence of the plasma irregularity and the related scintillation have been extensively investigated as a result of the impact on radio signal propagation. This study focused on the equatorial spread F (ESF) occurrence using ionogram data and IRI prediction taken across different longitude sectors, including the Jicamarca, Fortaleza, Ilorin,...

A comparative study of the equatorial spread F occurrence was conducted at different longitudes during 2009 or 2010 and 2011 or 2013 which represents the low (LSA) and moderate (MSA) solar activity periods respectively. The ionogram data were recorded at low latitude stations including Jicamarca (JIC; 75.76° W, 8.17° S), Peru; Fortaleza (FZA; 38.52...

The purpose of the presented study is to investigate the zonal drifts of Equatorial Plasma Bubbles (EPB) which applied two different ground-based instruments. Malaysia Real–Time Kinematics GNSS Network (MyRTKnet), consists more than 78 GPS receivers was used to observe EPB along 96° East to 120° East longitudes. Subsequently, zonal drift of EPBs de...

The seasonal variation of the electron density profile in equatorial anomaly region is investigated using Global Positioning System (GPS) ionospheric tomography method from a dense network of Malaysian Real-Time Kinematic Network (MyRTKnet). In this study, the monthly variation of the electron density is reconstructed to study the development of th...

This paper presents the estimation of receiver code bias of Global Positioning System (GPS) continuously operating reference stations (CORS) over Malaysian region, MyRTKnet stations. In this study, we used the Bernese software and adopted the algorithm from IONOLAB method to estimate the receiver code bias (RCB). It has been found that the RCB from...

Two-dimensional ionospheric total electron content (TEC) maps have been derived from ground-based Global Navigation Satellite System (GNSS) receiver networks and applied to studies of various ionospheric disturbances since the mid-1990s. For the purpose of monitoring and researching ionospheric conditions and ionospheric space weather phenomena, we...

We investigated a postmidnight field-aligned irregularity (FAI) event observed with the Equatorial Atmosphere Radar at Kototabang (0.2°S, 100.3°E, dip latitude 10.4°S) in Indonesia on the night of 9 July 2010 using a comprehensive data set of both neutral and plasma parameters. We examined the rate of total electron content change index (ROTI) obta...

The zonal velocity of equatorial plasma bubbles (EPBs) have been studied using various techniques in the past few years. However, the derivation of the zonal drift of EPBs using GPS ROTI have not been studied before. This study aims to investigate the zonal drifts of EPBs using GPS ROTI keogram. The Malaysia Real–Time Kinematic GNSS Network (MyRTKn...

The occurrence rate of the equatorial plasma bubble (EPB) with season, solar activity, and geomagnetic conditions are investigated using long-term data sets of Malaysia Real-Time Kinematics Network (MyRTKnet) from 2008 to 2013. The rate of TEC (total electron content) change index (ROTI) in 5 min was derived from MyRTKnet data to detect the EPB wit...

Malaysia Real-Time Kinematics GNSS Network (MyRTKnet) which consists of 78 GPS receivers was used to investigate the occurrence of equatorial plasma bubble (EPB) along 96°E–120°E longitude. In this study, we present the monthly occurrence rate of EPB along the geographical longitudes of 96°E–120°E for a half of solar cycle period (2008–2013). A 2D...

High-density GPS receivers located in Southeast Asia (SEA) were utilized to study the two-dimensional structure of ionospheric plasma irregularities in the equatorial region. The longitudinal and latitudinal variations of tens of kilometer-scale irregularities associated with equatorial plasma bubbles (EPBs) were investigated using two-dimensional...

In this study, the two-dimensional horizontal structure of EPB was observed using GPS total electron content (TEC) measurement in South East Asia region. Rate of TEC index (ROTI) is calculated from GPS TEC measurement and plotted onto two-dimensional map in geographic coordinate. Depletion of The OI 630.0 nm emission is completely coincided with RO...