一种BDS超短基线解算实验分析  

An experiment analysis of BDS ultra-short baseline solution

作　　者：刘站科[1,2] 张庆涛[2] 李毓照 苏春艳 陈小英[2] LIU Zhanke;ZHANG Qingtao;LI Yuzhao;SU Chunyan;CHEN Xiaoying(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;The First Geodetic Surveying Brigade of National Administration of Surveying,Mapping and Geoinformation,Xi＇an 710054,China;College of Geology Engineering and Geomantic,Chang;an University,Xi＇an 710054,China)

机构地区：[1]武汉大学测绘学院,武汉430079 [2]国家测绘地理信息局第一大地测量队,西安710054 [3]长安大学地质工程与测绘学院,西安710054

出　　处：《测绘科学》2018年第9期135-139,152,共6页Science of Surveying and Mapping

基　　金：测绘地理信息公益性行业科研专项(201512002)

摘　　要：针对BDS三频精密定位问题,该文将LAMBDA算法应用于BDS三频数据模糊度解算中,基于LAMBDA算法对BDS实测超短基线数据进行处理,分别从BDS 3个频点单历元模糊度固定成功率和基线E、N、U方向增量结果分析了LAMBDA算法的有效性。结果表明,LAMBDA算法能实现BDS各频点单历元模糊度固定及基线解算,其中,B1频点单历元模糊度固定成功率相对于B2、B3频点略差,但仍有超过93.7%的历元其单历元模糊度固定成功率高于95%,且整个时段单历元模糊度固定成功率均值优于98.7%;B2、B3频点基线E、N、U方向增量结果基本一致,但与B1频点结果有一定的差异,可能是由于B1频点的频率和波长与B2、B3差异较大引起的。Ambiguity solution is a key to obtain high precision positioning results in GNSS precise positioning,which LAMBDA algorithm is regard as the classic algorithm.In view of the BDS three frequency precise positioning problem,LAMBDA algorithm is applied to the BDS three frequency ambiguity resolution.Based on the ambiguity resolution of BDS ultra-short baseline data using LAMBDA algorithm,the single epoch success rate of ambiguity fixed for BDS three frequency and baseline increment of E,N,U direction are analyzed to verify the validity of LAMBDA algorithm in this paper respectively.Results show that the ambiguity fixing and baseline resolution of BDS three frequency could be realized by the LAMBDA algorithm,through them,compared with B2 and B3 frequency,the single epoch success rate of ambiguity fixed for B1 frequency is relative lower,while more than the 93.7% epoch for the single epoch success rate of ambiguity fixed in B1 frequency is higher than 95%,and the average single epoch success rate of ambiguity fixed for the whole time is better than 98.7%;the increment results of baseline E,N,U direction in B2 and B3 frequency are basically identical,but they have a certain differences compared with B1 frequency,which may be due to wavelength difference between B1 frequency and B2 or B3 frequency is larger.

关 键 词：BDS LAMBDA 超短基线 单历元 模糊度固定成功率 

分 类 号：P228[天文地球—大地测量学与测量工程]