基于谱迭代修正法GPS快速定位研究  

Study of GPS Quick Positioning Based on Algorithm of Spectrum Correction Iteration

作　　者：刘立龙[1] 唐诗华[1] 文鸿雁[1] 

机构地区：[1]桂林工学院土木工程系,广西桂林541004

出　　处：《工程勘察》2007年第12期54-56,64,共4页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金项目(40574002);广西区自然科学基金项目(桂科自0542002);桂林工学院博士基金项目

摘　　要：用LAMBDA方法确定GPS载波相位测量的整周模糊度,需要较高精度的浮点解。但用短时间GPS观测值构建的法方程容易出现病态,以致法方程的解很不稳定。本文使用谱修正迭代法,消除法方程病态,进而用LAMBDA方法确定整周模糊度。实验结果表明,对于1min左右的单频GPS载波相位测量,利用本文方法即可正确地解算出它的整周模糊度,从而实现厘米级定位。When LAMBDA method is used tofix an integer ambiguity of GPS carrier phase measurement, it is necessary to have a high accuracy of float solution. But the normal equation that is constituted by short time observable of GPS carder phase measurement, could easily give an abnormal state. It results in very instable solution for the normal equation. This paper proposes the algorithm, which uses a spectrum correction iteration to eliminate the abnormal state of the normal equation. Then, LAMBDA method is used to solve the integer ambiguity of GPS cartier phase measurement. The experimental results indicate that the mentioned algorithm can solve that of single frequency at about 1 minute, and acquire the positioning at cm level.

关 键 词：GPS载波相位测量 整周模糊度 法方程 谱修正迭代法 LAMBDA 

分 类 号：P228.4[天文地球—大地测量学与测量工程]