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Space science is a field that is gaining much attention of students and society in Malaysia after the success of sending an astronaut to the International Space Station (ISS). This pilot study aims to investigate secondary school students' perception and attitude towards space science in Malaysia. The study was conducted by using a questionnaire containing 10 items measuring students' perception and...
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 ROTI enhancement region from GPS TEC measurement. Therefore,...
GPS signals that propagate through the ionosphere at two L-band GPS frequencies L1 (1575.42 MHz) and L2 (1227.36 MHz) provides an important ionospheric parameter which is Total Electron Content (TEC). The total electron content (TEC) is defined as the total number of electrons integrated along the path from the receiver to the GPS satellite in a column with a cross-sectional area of one square meter...
Sudden Ionospheric Disturbances (SID) are transient changes in the ionosphere caused by enhancement in X-ray and EUV fluxes during solar flare events. The SuperSID space weather monitor has been developed by Stanford University Solar Center to detect SID via VLF remote sensing. In this paper, a receiver system named as UKM-SuperSID has been developed to detect SID in the equatorial region. The system,...
The ionosphere is a layer in the Earth's atmosphere where free electrons exist in sufficient numbers to affect the propagation of electromagnetic waves especially the Global Positioning System (GPS) signals. The study of the Total Electron Content (TEC) variation in the ionosphere and structures is important to ensure the reliability of radio communication systems and accuracy of space weather forecasting...
Radio waves such as Global Positioning System (GPS) signals propagate through the ionosphere and experience several effects, one of which is an additional group delay that is approximately proportional to the total number of free electrons encountered by the wave. Accurate correction, prediction and assessment for ionospheric error are needed for accurate measurement. In forecasting ionospheric delay,...
This paper analyzes and compares TEC measurement at GPS stations belonging to UKM installed at Husafell, Iceland (64° 40′ N, −21° 1′ E) in the high-latitude and UKM (2° 55′ N, 101 ° 46′ E) in the equatorial latitude. A high performance dual-frequency GPS receiver with chock-ring antenna was used in this study. GPS data for the whole year of 2009 were used in this analysis. BGS's Bernese Processing...
Global Positioning System (GPS) derived total electron content (TEC) measurements were analyzed to investigate the ionospheric response during the X-class solar flare event that occurred on 5-6 December 2006 at geomagnetic conjugate stations: Syowa, Antarctica (SYOG) (GC: 69.00°S, 39.58°E; CGM: 66.08°S, 71.65°E) and Árholt, Iceland (ARHO) (GC: 66.19°N, 342.89°E; CGM: 66.37°N, 71.48°E). Bernese GPS...
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