东南大学学报（自然科学版）Issue(z2)：400-405,6.DOI:10.3969/j.issn.1001-0505.2013.S2.039
基于区域参考站网络的精密卫星钟差估计及其在实时精密单点定位中的应用
Precise clock estimation of satellites based on regional reference stations and its application on real-time PPP
摘要
Abstract
Based on regional GNSS ( global navigation satellite system) network, a new clock esti-mation method by using real-time IGU ( international GNSS service ultra-rapid) predicted ephemeris and satellite-difference strategy was proposed.The clock estimation accuracy and the corresponding factors were analyzed.On this basis, the clock-inversion regional stations ( GNSS stations in Chongqing) and the inter-region stations ( CORS ( continuous operational reference system) stations in Jiangsu) were tested by PPP ( precise point positioning) experiments with the IGU ephemeris and the real-time estimated clock.The experimental results show that the average RMS ( root mean square) between the relative clock estimated by the new method and the IGS ( international GNSS service) final clock product is 0.08 ns.The visible satellite elevation is the main factor influencing the clock-estimated accuracy.As for the GNSS stations in Chongqing and the CORS stations in Jian-gsu which is about 1 200 km away from Chongqing, the average convergence times of PPP were 11.5 and 14.1 min, respectively.During static PPP, all the positioning accuracies in north/east/up ( N/E/U) direction from 1 h observation can reach centimeter-level.关键词
区域参考站/钟差估计/高度角/实时PPPKey words
regional reference stations/clock estimation/elevation/real-time precise point positio-ning ( PPP)分类
天文与地球科学引用本文复制引用
高旺,高成发,潘树国,王胜利,夏炎..基于区域参考站网络的精密卫星钟差估计及其在实时精密单点定位中的应用[J].东南大学学报（自然科学版）,2013,(z2):400-405,6.基金项目
“十二五”国家科技支撑计划重点资助项目（2012BAJ23B01）． （）
