Analysis of the Accuracy of Beidou Combined Orbit Determination Enhanced by LEO and ISL

doi:10.11947/j.AGCS.2016.F032

Abstract

Abstract:

In order to improve the precision of BeiDou orbit determination under the conditions of regional ground monitoring station and make good use of increasingly rich on-board data and upcoming ISL technology, a method of BeiDou precision orbit determination is proposed which combines the use of ground monitoring stations data, low earth orbit satellite(LEOs) data and Inter-Satellite Link(ISL) data. The effects of assisting data of LEOs and ISL on the precision orbit determination of navigation satellite are discussed. Simulation analysis is carried out mainly from the number of LEOs, orbit slot configuration and ISL. The results show that the orbit precision of BeiDou will greatly improve about 73% with a small number of LEOs, while improvement of clock bias is not remarkable; the uniform orbit slot configuration of the same number of LEOs has a modest effect on the accuracy of combined orbit determination; compared with LEOs, the increase of ISL will significantly improve the accuracy of orbit determination with a higher efficiency.

Key words: monitoring station, low earth orbit satellite, Inter-Satellite Link, BeiDou, orbit determination

CLC Number:

P229

FENG Laiping, MAO Yue, SONG Xiaoyong, SUN Bijiao. Analysis of the Accuracy of Beidou Combined Orbit Determination Enhanced by LEO and ISL[J]. Acta Geodaetica et Cartographica Sinica, 2016, 45(S2): 109-115.

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