The BeiDou navigation satellite system (BDS) is a global navigation satellite system independently developed by China. The user's high-precision positioning relies on the precise orbit determination (POD) of the BeiDou satellites. The traditional POD mainly uses the observation data of ground monitoring stations, and the POD results are greatly affected by the global distribution of observation stations and atmospheric time delay. The autonomous POD using inter-satellite link (ISL) data can reduce the dependence of the BDS on ground station and avoid the impact of the atmosphere on observation. In this paper, batch processing method is used to process the ISL data to determine the orbit of BeiDou satellites. Epoch reduction is performed, the clock difference and the geometric range can be obtained by subtracting and summing the dual one-way ranging data. The preliminary results of autonomous BDS POD are: the root mean square of the positional deviation is about 0.50 m compared with the precise ephemeris published by iGMAS (Mean value of all satellites), the mean value of ISL residuals is 0.09 m, the mean value of the User Range Error (URE) is 0.12 m (Mean value of all satellites). Then, we studied the influences to POD precision from the initial error of the reference satellite and the changing of reference satellite respectively. The result shows that the error is proportional to the product of the orbital semimajor axes of satellites in the constellation and the initial rotation angle of the reference satellite, the precision can also be improved when the satellite with a higher initial precision is selected as the reference satellite. We also studied the POD result without EOP coefficients and the result shows that setting the EOP coefficients to zeros will not influence the precision significantly but reduce the convergence speed of iteration.
Research on Autonomous Orbit Determination Based on BeiDou Navigation Satellite System Inter-Satellite Link
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 : 40 ; 461-471
02.11.2023
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
BeiDou Navigation Satellite System , Inter-satellite Link , Orbit Determination , Autonomous Orbit Determination Engineering , Communications Engineering, Networks , Signal, Image and Speech Processing , Aerospace Technology and Astronautics , Control, Robotics, Mechatronics , Computer Applications , Geography, general
Research on Autonomous Orbit Determination Test Based on BDS Inter-Satellite-Link on-Orbit Data
British Library Conference Proceedings | 2017
|BeiDou: Navigation Satellite System Development
British Library Conference Proceedings | 2021
|Satellite Navigation Inter-satellite Link Technology
Springer Verlag | 2020
|