Paper Info
Title
Research on the Rotational Correction of Distributed Autonomous Orbit Determination in the Satellite Navigation Constellation
Abstract
The autonomous orbit determination of the navigation constellation uses only bidirectional ranging data of the inter-satellite link for data processing. The lack of space-time benchmark information related to the Earth inevitably causes overall rotational uncertainty in the constellation, leading to a decrease in orbit accuracy and affecting user positioning accuracy. This study (1) introduces a method for rotation correction in distributed autonomous orbit determination based on inter-satellite bidirectional ranging; (2) conducts constellation autonomous orbit determination and time synchronization processing experiments based on inter-satellite ranging data for the 24 medium Earth orbit (MEO) satellites in the Beidou-3 global satellite navigation system (BDS-3); and (3) makes comparative analyses on the accuracy of autonomous orbit determination based on three rotation correction cases, including a no-rotation-correction case, independent satellite constraints case, and global satellite constraints case. The experimental results are described as follows. For the no-rotationcorrection case, the prediction error of the orbital inclination angle (iot, i) for the entire constellation on the 30th day was 2.11 x 10(-7)/rad, the prediction error of the right ascension of the ascending point (Omega, Omega) was 2.25 x 10(-7)/rad, and the average root mean square (RMS) of the user range error (URE) for the entire constellation orbit was 1.41 m. In the autonomous orbit determination experiment with independent constraints on satellites, the prediction error of i for the entire constellation on the 30th day was 5.43 x 10(-7)/rad, the prediction error of Omega was 2.03 x 10(-7)/rad, and the average RMS of the orbital URE for the entire constellation was 1.09 m. In the autonomous orbit determination experiment with global satellite constraints, the prediction error of i for the entire constellation on the 30th day was 5.31 x 10(-7)/rad, the prediction error of Omega was 1.95 x 10(-7)/rad, and the RMS of the orbital URE for the entire constellation was 0.94 m. According to the analysis of the above experimental results, compared with the autonomous orbit determination under the no-rotation-correction case, the adoption of an algorithm for independent satellite constraints to correct the overall constellation rotation weakens the constellation rotation influence; however, it may destroy the overall constellation configuration, which affects the stability of autonomous orbit determination. Finally, the algorithm based on global satellite constraints both impairs the influence of constellation rotation and maintains the overall constellation configuration.
Year
DOI
Venue
2022
10.3390/rs14143309
REMOTE SENSING
Keywords
DocType
Volume
Beidou satellite navigation system, distributed autonomous orbit determination, inter-satellite link, overall constellation rotation, algorithm for the correction of independent satellite constraints, algorithm for the correction of global satellite constraints
Journal
14
Issue
ISSN
Citations 
14
2072-4292
0
PageRank 
References 
Authors
0.34
0
6
Name
Order
Citations
PageRank
Zhou Wei12422.00
Hongliang Cai200.68
Ziqiang Li300.34
Chengpan Tang402.03
Xiaogong Hu535.61
Wanke Liu600.34