利用精密星历进行单点定位的数学模型和初步分析

The Model of Single-point Positioning by Use of Precise Ephemeris and Result Analysis

精密单点定位 (PrecisePointPositioning ,简称PPP) ,是相对于一般的单点定位而言的 ,它是利用GPS的精密星历和钟差文件 ,以载波相位和伪距为观测资料 ,进行独立的单点精密定位。它的特点在于各站的解算相互独立 ,计算量远远小于一般的相对定位。尝试以伪距为观测值 ,利用JPL给出的精密星历 ( .sp3 )和钟差 ( .clk) ,进行精密单点定位的试验 ,取得了初步的结果。

Precise Point Positioning(PPP) means using JPL or IGS provided precise orbits and GPS clock errors, and individual station's carrier phase and pseudo range data for absolute position. Its main point is that every station will not influence each other and compute quickly. In this article, we use pseudo range as observation, using JPL provided precise orbits(*.sp3) and GPS clock errors(*.clk), for precise point positioning experiment. Here result and analysis is introduced.