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Conference Paper

Doppler positioning model and performance analysis of LEO constellation

Authors

Guo,  Fei
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Yang,  Yan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhang,  Xiaohong
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Guo, F., Yang, Y., Zhang, X. (2023): Doppler positioning model and performance analysis of LEO constellation, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3758


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020786
Abstract
With the various LEO constellations to be built over the next decade, Doppler shift from low Earth orbit (LEO) satellites can be used as signals of opportunity to provide backup and supplementation for GNSS positioning, navigation, and timing (PNT) service. This report mainly focuses on the LEO instantaneous Doppler positioning model and its positioning performance in different scenarios. Given a LEO constellation with 288 satellites, we first simulate Doppler shift observations at nine stations. Results show that in the middle and low latitudes, the number of LEO visible satellites is about 10-15, and the Doppler position dilution of precision (PDOP) reaches 500-600, while in the middle and high latitudes, the number of LEO visible satellites reaches more than 30, and the corresponding PDOP value decreases to about 180. Static LEO Doppler positioning results show that an accuracy of centimeter to decimeter level can be achieved after a period of convergence. For static simulated kinematic positioning test, the RMSEs range from a few decimeters to several meters at different regions by giving different constraints.