GPS伪距双差方法比较分析

在文献1]研究的理论背景下,研究将文献1]中方法运用于GPS控制网中时需要解决的关键问题-获取基线偏差小于0.7m的基线初始值。为此,对简单伪距双差,精密星历伪距双差和载波相位平滑伪距双差进行了分析。用自编软件解算了实测基线,得出3种方法在15min时间内都可以获得偏差小于0.7m的基线向量初始值,其中载波相位平滑伪距双差的结果最理想。

The analysis of several GPS Psudorange difference methods

On the basis of reference 's research result,this paper mainly puts attention on a sticking point-the approximate baseline vector 's precision need exceed 0.7m when the new method used in GPS network.In order to obtain the qualified approximate baseline vector,this paper uses three methods :the simple difference of code Pseudoranges,the difference of carrier phase smoothing code Pseudoranges and the difference of code Pseudoranges under IGS(International GPS Service)Ultra-rapid precise ephemeris.This paper analyzes the result from those methods.