REAL-TIME ESTIMATION OF PRECISE SATELLITESCLOCK BIAS BASED ON IGU PREDICTED ORBIT
Li Li 1) ; Kuang Cuilin 1) ; Zhu Jianjun 1) ; and Chen Yongqi 1,2)
1)Department of Survey Engineering and Geomatics, Central South University, Changsha 4100832)Department of Land Surveying and Geo-informatics, The Hong Kong Polytechnic University, Hong Kong
Abstract：Aiming at the accuracy of the GPS satellite clock bias service the realtime precise point positioning (PPP) currently, a method for realtime estimating the satellite clock bias based on the basis of IGU (IGS Ultrarapid) predicted orbits is put forward. In this method the undifferenced carrier phase observations of global reference stations is used to estimate the realtime clock bias. Numerical calculation results show that most of deviations between the estimated satellite clock bias and the IGS final product are less than 0.3 ns, and the average accuracy is better than 0.2 ns; with the real-time estimated satellite clock bias, the static accuracy of PPP can achieve 1-2 cm, but also the accuracy of zenith tropospheric delay (ZTD),can reach to millimeter level.
Li Li ,Kuang Cuilin ,Zhu Jianjun et al. REAL-TIME ESTIMATION OF PRECISE SATELLITESCLOCK BIAS BASED ON IGU PREDICTED ORBIT[J]. jgg, 2011, 31(2): 111-116.
