不同模式下GPS定位精度分析  

Analysis of GPS Positioning Accuracy in Different Modes

作　　者：杨长金 YANG Changjin(Geological Survey and Design Institute of Guizhou Nonferrous Metals and Nuclear Industry Geology Bureau,Guiyang 550005,China)

机构地区：[1]贵州省有色金属和核工业地质局地质勘测设计院,贵州贵阳550005

出　　处：《测绘与空间地理信息》2022年第9期139-142,共4页Geomatics & Spatial Information Technology

摘　　要：为详细分析GPS多频定位精度,本文以GPS三频自测试数据为基础,采用RTKLIB软件解算得到了GPS多频伪距单点定位、精密单点定位以及短基线相对定位坐标值,并且进一步分析了不同情况下的定位精度。结果表明,伪距单点定位模式下,单频伪距单点定位精度要优于双频和三频组合;精密单点定位模式下,三频组合精密单点定位精度优于双频组合;短基线相对定位模式下,三频组合短基线相对定位精度优于双频组合和单频。上述研究成果为今后GPS不同模式定位频率的选择提供一定的参考。In order to analyze the accuracy of GPS multi-frequency positioning in detail,this article uses GPS three-frequency self-test data as the basis,and uses RTKLIB software to obtain GPS multi-frequency pseudo-range single-point positioning,precise single-point positioning,and short baseline relative positioning coordinate values.The positioning accuracy under different conditions is further analyzed.The results show that in the pseudo-range single-point positioning mode,the single-frequency pseudo-range single-point positioning accuracy is better than the dual-frequency and triple-frequency combination,and the three-frequency combination precision single-point positioning accuracy is better than the dual-frequency combination in the precision single-point positioning mode.In the short baseline relative positioning mode,the short baseline relative positioning accuracy of the three-frequency combination is better than the dual-frequency combination and single-frequency,which provides a certain reference for the selection of positioning frequencies in different GPS modes in the future.

关 键 词：GPS 多频 定位精度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]