Abstract
The bottleneck of Precise Point Positioning (PPP) is the long convergence time for achieving the centimeter accuracy. Some researchers put forward to improve the diversity of available satellites’ geometric distribution and reduce the correlation of observation data by deploying the Low Earth Orbit (LEO) constellations in addition to the medium and high-orbit satellites. The prerequisite is to get the precise orbit products of all these orbiting satellites. This paper studies the combined precise orbit determination for high-, medium-, and low-orbit navigation satellite systems. In order to investigate the theory and algorithms of the high–medium–low POD and to study the effect of LEO to the POD of high-orbit satellites and the influence of ground data from LEO to its own POD, we simulate all the data, including high orbit to low orbit, medium orbit to low orbit, high orbit to ground stations, medium orbit to ground stations, and low orbit to ground stations. The results show that the combined POD can improve the precision of high-orbit satellites significantly, especially for the along-track component, which can reach to sub-decimeter even centimeter level. Also, the precision of LEO POD can be improved with the data from ground stations.
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Acknowledgements
The study is sponsored by the National Natural Science Funds of China (41622401, 41574023, 41374031) and the State Key Laboratory of Geodesy and Earth’s Dynamics (Institute of Geodesy and Geophysics, CAS) (SKLGED2016-3-1-EZ).
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Ge, H., Li, B., Ge, M., Shen, Y., Nie, L., Schuh, H. (2017). Combined Precise Orbit Determination for High-, Medium-, and Low-Orbit Navigation Satellites. In: Sun, J., Liu, J., Yang, Y., Fan, S., Yu, W. (eds) China Satellite Navigation Conference (CSNC) 2017 Proceedings: Volume III. CSNC 2017. Lecture Notes in Electrical Engineering, vol 439. Springer, Singapore. https://doi.org/10.1007/978-981-10-4594-3_15
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DOI: https://doi.org/10.1007/978-981-10-4594-3_15
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