大地测量与地球动力学2011，Vol.31Issue(2)：111-116,6.
基于IGU预报轨道实时估计精密卫星钟差
REAL-TIME ESTIMATION OF PRECISE SATELLITES CLOCK BIAS BASED ON IGU PREDICTED ORBIT
摘要
Abstract
Aiming at the accuracy of the GPS satellite clock bias service the real-time precise point positioning (PPP) currently, a method for real-time estimating the satellite clock bias based on the basis of IGU (IGS Ultrarapid) predicted orbits is put forward. In this method the un-differenced carrier phase observations of global reference stations is used to estimate the real-time 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.关键词
实时/卫星钟差估计/精密单点定位/IGU数据产品/预报轨道Key words
real-time/ satellite clock estimation/ precise point positioning/ IGU data product/ predicted orbit分类
天文与地球科学引用本文复制引用
李黎,匡翠林,朱建军,陈永奇..基于IGU预报轨道实时估计精密卫星钟差[J].大地测量与地球动力学,2011,31(2):111-116,6.基金项目
国家自然科学基金(40974007,41004012) （40974007,41004012）
中南大学前沿研究计划(2009QZZD002) （2009QZZD002）
