The low-latitude ionosphere: modelling of ionospheric effects on relative GPS measurements | ||||
| The International Conference on Electrical Engineering | ||||
| Article 160, Volume 6, 6th International Conference on Electrical Engineering ICEENG 2008, May 2008, Page 1-12 PDF (153.44 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iceeng.2008.34532 | ||||
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| Authors | ||||
| Norsuzila Ya’acob; Mardina Abdullah; Mahamod Ismail | ||||
| Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia. | ||||
| Abstract | ||||
| Abstract: Apart from geodesy and geophysical interest, GPS has great importance in scientific applications. For many years GPS has played a major role in determining ionospheric characteristics, including TEC and electron density profiles. The ionospheric effects in the propagation of Global Positioning System (GPS) signal is one of the main sources of error in GPS precise positioning. Therefore, it is important to have a precise estimation of the ionospheric delays. The developed model is a function of elevation angle and TEC. Then ionospheric correction model has been developed to accurately determine the difference in ionospheric delay so that a more accurate differential GPS correction can be made. A good model for the low-latitude region has become more and more important because of the need for high accuracy GPS positioning. An ionospheric error correction model should be made applicable to any location including the low-latitude region. The model has been validated and it gives the differential (between spaced receivers) ionospheric error to sub-centimetre accuracy. | ||||
| Keywords | ||||
| Precise GPS positioning; Ionosphere; differential GPS (dGPS); TEC | ||||
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