A Modified Real-time Orbit Determination Algorithm for LEO Satellites

X. Lin and L. Li

Abstract:	The development of remote sensing technology and a trend towards highly autonomous spacecraft application motivates a growing demand for accurate real-time navigation of satellites in LEO. Traditional methods perform precise orbit determination in a post processing manner and a positioning accuracy of 10m is achievable in real-time. However, with the availability of high quality IGS orbit and clock products and the development of signal processing technique, real-time orbit determination of higher accuracy has become possible. An improved real-time precise orbit determination method with a new RAIM algorithm and observation weighting scheme based on study of real data is proposed in this paper. A sub-decimeter level accuracy is achieved using the IGS products of the best precision and a sub-meter accuracy is achieved using real-time products, due to the deterioration of satellite clock correction precision.
Published in:	Proceedings of the 2014 International Technical Meeting of The Institute of Navigation January 27 - 29, 2014 Catamaran Resort Hotel San Diego, California
Pages:	534 - 540
Cite this article:	Lin, X., Li, L., "A Modified Real-time Orbit Determination Algorithm for LEO Satellites," Proceedings of the 2014 International Technical Meeting of The Institute of Navigation, San Diego, California, January 2014, pp. 534-540.
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