GPS星历精度对基线解算的影响  

Impact of the ephemeris precision of GPS satellites on the solutions of the baselines

作　　者：周勇 彭云[2] 

机构地区：[1]浙江玉环县城建测量队,浙江玉环317600 [2]信息产业部综合勘察研究院,浙江嘉兴314000

出　　处：《桂林工学院学报》2004年第2期192-194,共3页Journal of Guilin University of Technology

基　　金：国家自然科学基金重点项目(19833030);国家自然科学基金面上项目(NSFC-10073017)

摘　　要：在GPS基线解算中,卫星星历是解基线的数学基础,星历的精度对基线解算结果具有影响.星历有两种,广播星历和精密星历,前者精度为20～40m,可以适时获得,后者的精度为亚米级,只能验后获得.用实例讨论了两种星历对基线解算结果与精度的影响:对短基线,广播星历能够满足精度;而对长基线,必须用精密星历.The ephemeris of GPS satellites and the coordinates of the satellites are the mathematical basis in solving the GPS baselines. Their precision can affect the solutions of baselines. There are two ephemerises: broadcast one and exact one. The former has the precise 20～40 m and can be obtained in real time. The later has the sub-meter-order precise and can only be obtained after experiment. The discusses is presented about the impact of the two ephemerises in solving baselines by a practical example. It is shown that for short baselines in engineering, the broadcast ephemeris can satisfy the requirement while for the long baselines, the precise ephemeris is necessary.

关 键 词：GPS星历 GPS基线 GPS精度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]