Beidou Navigation Constellation Orbit Determination Based on MGEX Data
1 Geomatics College, Shandong University of Science and Technology, 579 Qianwangang Road, Qingdao 266510,China
2 Chinese Academy of Surveying and Mapping, 28 West-Lianhuachi Road, Beijing 100830,China
Abstract The double-difference method is used to determine the Beidou navigation satellite system orbit with multi-GNSS experiment (MGEX) data. This paper mainly studies the precise orbit determination (POD) strategy of Beidou satellite orbit, then discusses the basic process of determining Beidou navigation constellation orbits. Finally, based on observation data, the paper determines the three-day orbit solution of Beidou navigation constellation. The experimental results show that the internal precision of the 1D RMS of MEO and IGSO satellites in orbit determination is better than 0.2 m, the radial direction could be better than 10 cm, and outer precision is better than 30 cm| furthermore, GEO (the C05) satellite outer precision is 〖JP2〗better than 0.7 m, and the radial direction could be better than 10 cm.
