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Total Electron Content (TEC) is the main parameter in the ionosphere that has significant effect on the propagation of radio waves causing delay errors on the GPS signals. Therefore, identifying an effective forecasting method is important to reduce the GPS position error. This research aimed to use the statistical Holt-Winter method to forecast the ionospheric vertical TEC (VTEC) over Malaysia. The...
The main cause of errors in the navigation of the Global Positioning System (GPS) satellite is the ionospheric delay. Therefore, ionospheric delay forecasting studies play an important role in the reduction of the positioning error. This paper focuses on forecasting of ionospheric delay using the statistical Holt-Winter method during the quiet and disturbed days in October 2011, using GPS Ionospheric...
The F2-layer peak height, hmF2, is one of the most important parameters needed for HF radio frequency planning and spectrum management. Therefore, the ability to model and predict HF frequencies using hmF2 empirical model is of great use for radio frequency planning and operation. This study aimed to identify and evaluate ionospheric empirical model, i.e. hmF2 empirical model, to be utilized as the...
We have studied the variations of TEC at quasi-conjugate points using data obtained from GPS receiver at Syowa station, Antarctica (SYOG) (GC: -69.00?? S, 39.58?? E; CGM: -66.08??S, 71.65 E??), and A??rholt station (ARHO), Iceland (high Arctic region) (GC: 66.19?? N, 342.89?? E; CGM: 66.37??S, 71.48 E??) for a period in 2007, during the minimum phase of solar cycle 23. The GPS measurements of IGS...
This paper describes an analysis of ionospheric models compared with real data during the occurrence of travelling ionospheric disturbances. GPS data was taken from Parit Raja Station (1deg 52' N, 103deg 06' E) in Southern Malaysia. Comparison was made from collected data during the geomagnetic quiet and storm days. Ionospheric models i.e. IRI2001, NeQuick and real data as in IONEX format were used...
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