GPS星历精度对精密单点定位的影响The influences of GPS ephemerises accuracy to the precise point positioning
李鹏,熊永良,黄育龙,楚亮
摘要(Abstract)：
精密单点定位的实质就是利用精密星历和精密卫星钟改正来实现单机精密定位。本文简要地介绍了精密单点定位的原理及技术关键,在此基础上,分析了IGS目前提供的3种精密星历(IGF、IGR、IGU)的精度和时延性。根据实验数据进一步分析了3种精密星历对精密单点定位精度的影响。通过精度分析,得出利用IGS的超快星历也可以达到厘米级定位精度,为全球厘米级单站RTK提供了有益的参考。
关键词(KeyWords)： 精密单点定位;精密星历;精度分析
基金项目(Foundation):
作者(Author): 李鹏,熊永良,黄育龙,楚亮
参考文献(References)：
- [1]刘经南,叶世榕.GPS非差精密单点定位技术探讨[J].武汉大学学报信息科学版,2002,27(3):234-240.
- [2]韩保民,欧吉坤.基于GPS非差观测值进行精密单点定位研究[J].武汉大学学报信息科学版,2003,28(4):409-412.
- [3]Zumberge J F,Gendt G.The Demise of Selective Availa-bility and Implications for the International GPS Service Network[J].Physics and Chemistry of the arth,2001,26(A):637-644.
- [4]Heroux P,Kouba J,Collins P,et al.GPS Carrier2Phase Point Positioning With Precise Orbit Products[J].The International Symposium on Kinematic Systems in Geode-sy,Banff,Canada,2001.
- [5]Kouba J,Heroux P.Precise Point Positioning Using IGS Orbit and Clock Products[J].GPS Solutions,2001,5(2):12-28.
- [6]Yang Gao,Kongzhe Chen.Performance Analysis of Pre-cise Point Positioning Using eal-Time Orbit and Clock Products[J].Journal of Global Positioning System,2004,3(1):95-100.
- [7]Gao Y and Shen X.A New Method for Carrier-Phase-Based Precise Point[J].Journal of the Institute of Navi-gation,2002,49(2):109-116.
- [8]Gao Y,James F M.Single-Point GPS Positioning Accu-racy Using Precise GPS Data[J].The Australian Sur-veyor,1997,42(4):185-192.
- [9]Zumberge J F,MMWatkins and F HWebb.Characteris-tics and Applications of Precise GPS Clock Solution Every30Seconds[J].Journal of Navigation,1998,44(4):449-456,1998.