GPS点定位:软件与结果

GPS POINT POSITIONING: SOFTWARE AND RESULTS

本文首先介绍作者开发的GPS点定位软件SPP，接着叙述了SPP赖以工作的基本观测量和软件研制中对于消除电离层影响的特别考虑。随后给出了用1990年8月在上海采集的WM102数据算得的八类消电离层解的结果。分析了它们的内部精度，并同SLR结果进行了比较。结果表明，用若干小时数据，所提出的八种解的精度均可达到几米以内。这中间，双频相位解可以达到2米，双频伪距解可以达到6米，单频相位和伪距组合解的精度可以相当于甚至优于双频伪距解。

: This paper first outlines the GPS point positioning software, SPP, developed by the author and then describes the basic observables on which SPP operates and the special considerations on the removal of the ionospheric effect in the software development. In the paper the results are presented of eight types of ionosphere-free solutions obtained by processing the WM102 data collected at Shanghai in August 1990. The internal accuracy is analysed and the comparison between GPS and SLR results is made. In has been shown that using several hour data, all of eight solution types can recov er the receiver location within several meters. Among these, the dual frequency phase solution may achieve a 2 meter accuracy, the dual frequency pseudorange solution may attain 6 meter accuracy level, and the combined solution of the single frepuency phase and pseuorange is commensurate with or even better than the dual frequency pseudorange solution in accuracy.