Abstract:We discuss the method of orbit determination combining the on-board data of LEO with the observation data of regional monitor stations. In order to validate this proposed approach and its performance, the observation data of 7 GPS stations in China and on-board data of GRACE-A&B during March 16-31, 2011 are collected and orbit determination experiments were carried out. The results show that, compared with the result of 7 stations, the visibility of GPS satellites is increased by about 14%. Meanwhile, the precision of GPS orbits expressed in R,T,N components are improved by about 35%, 44% and 45% respectively when introducing only GRACE-B; improvements in R,T,N components of 51%, 60% and 62% are achieved when both GRACE-A and GRACE-B are introduced and the visibility of GPS satellites is increased by 18% in this case. The proposed approach provides a new means to improve the orbit determination accuracy of navigation satellites under the restriction of regional monitoring stations.
FENG Laiping,RUAN Rengui,WU Xianbing et al. Precise Orbit Determination of Navigation Satellite Using Joint Data from Regional Tracking Station and LEO[J]. jgg, 2016, 36(10): 864-870.