Abstract The number and distribution of ground stations affects the accuracy and reliability of real-time satellite clock estimation. As current BDS mainly provides services to the Asia-Pacific region, the article selects 8, 12, 18 and 24 real-time ground monitoring stations distributed equally in the China region to analyze the relationship between the number of regional stations and the accuracy of BDS real-time satellite clock. The results show that, when the number of stations is less than 16, the arc length of IGSO/MEO satellite is observed in the Chinese region is not complete, and that real-time clock accuracy and positioning accuracy is poor. When the number of stations reaches 16, the observable BDS satellite arc length is covered in the China region. When the number of stations reaches more than 17, real-time clock accuracy is 0.15 ns, and positioning accuracy is 0.3 m or more in the horizontal direction and 0.4 m or more in the vertical direction; further, real-time clock estimation accuracy and positioning accuracy no longer significantly increases with the number of stations.
LI Pingli,ZHANG Qin,CUI Bobin et al. Performance Analysis of Real-Time BDS Clock Estimation for the Number of Regional Stations[J]. jgg, 2018, 38(7): 673-678.
LI Pingli,ZHANG Qin,CUI Bobin et al. Performance Analysis of Real-Time BDS Clock Estimation for the Number of Regional Stations[J]. jgg, 2018, 38(7): 673-678.