Single-receiver ambiguity fixing can enhance the observation geometric constraint, and improve the orbit accuracy of low Earth Orbit (LEO) satellites. We propose a single-receiver ambiguity fixing method by taking the carrier phase residual as the index to choose reference in the single-difference ambiguities. The ambiguity fixing performance and Precise Orbit Determination (POD) is verified by using the spaceborne BDS3 observation from Tianhui 02-02 satellites. The ambiguity fixing success rates for BDS3 wide- and narrow-lanes are 98% and 89%. Taking the GPS-based orbit with single-receiver ambiguity fixing as a reference, the orbit comparison shows that the accuracy of radial, tangential and normal directions of BDS3-based POD are improved by 26%, 42% and 52% with the single-receiver ambiguity fixing, and the three-dimensional RMS of orbit difference is improved from 2.5 cm to 1.4 cm. The baseline from the orbit difference is evaluate by comparing to the baseline derived from the double-difference GPS-based precise relative orbit determination. The radial, tangential and normal accuracy of baseline solution are improved by 27%, 45% and 46% when fixing ambiguity. The 3D RMS of baseline difference is reduced from 7.6 mm to 4.3 mm. The single-receiver ambiguity fixing can be performed by using our ambiguity fixing method, and the accuracy of BDS3-based POD and baseline can be improved.
BDS3-Based Precise Orbit Determination for LEO Satellites with Single-Receiver Ambiguity Fixing
Lect. Notes Electrical Eng.
China Satellite Navigation Conference ; 2024 ; Jinan, China May 24, 2024 - May 26, 2024
China Satellite Navigation Conference (CSNC 2024) Proceedings ; Kapitel : 11 ; 118-130
02.11.2023
13 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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