基于部分模糊度解算的BDS/GPS组合RTK算法  

Combined BDS/GPS RTK based-on partial ambiguity resolution

作　　者：刘伟[1] 李长庚[1] 满小三 LIU Wei;LI Changgeng;MAN Xiaosan(Physical Science and Electronics,Central South University,Changsha 410012,China;Hunan Glonavin Information Technology Company,Changsha 410005,China)

机构地区：[1]中南大学物理与电子学院,湖南长沙410012 [2]湖南格纳微信息科技有限公司,湖南长沙410005

出　　处：《测绘工程》2018年第9期11-15,共5页Engineering of Surveying and Mapping

基　　金：湖南省科技重点计划资助项目(2015GK3003)

摘　　要：GNSS多频率组合RTK定位逐步进入实际应用,存在模糊度维数增多、搜索空间增大,导致模糊度搜索运算量增大及模糊度固定效率低等问题。文中提出一种多星座部分模糊度解算算法,该算法综合考虑卫星高度角、模糊度固定成功率及Ratio值来筛选卫星进行模糊度解算。通过一组动态跑车实验分析表明:相比于全模糊度解算(FAR),部分模糊度解算(PAR)可以有效地提高BDS/GPS组合RTK的模糊度固定率,其模糊度固定率从79.9%(FAR)提高到99.1%(PAR),且PAR算法定位结果可靠性更高。As the combined multi-constellation and multi-frequency combined RTK positioning is gradually put to practical use,the number of the dimensions of ambiguity and the the search space significantly increases,which results in the increased computation of ambiguity search and low efficiency of ambiguities fixed.This paper presents a multi-constellation partial ambiguity resolution algorithm,which comprehensively considers the satellite elevation angle,success rate of ambiguity fixed and Ratio values to screen satellite for ambiguity solution.A set of kinematic experiments conducted show that:compared with the full ambiguity resolution(FAR),the partial ambiguity resolution(PAR)can effectively improve ambiguity fixed rate of combined BDS/GPS/GLONASS RTK with the ambiguity fixed rate increasing from 79.9%(FAR)to 99.1%(PAR)and positioning results of PAR algorithm getting more reliable.

关 键 词：GNSS 模糊度固定成功率 部分模糊度解算 RTK 

分 类 号：P228[天文地球—大地测量学与测量工程]