GPS/Galileo/BDS系统测距信号精度分析与评价  

Analysis and evaluation on accuracy of GPS/Galileo/BDS range signal

作　　者：刘国燕[1] 沈飞 丁艺伟 汪登辉[4] LIU Guoyan;SHEN Fei;DING Yiwei;WANG Denghui(School of Electrical Engineering,Nanjing Insititute of Industry Technology,Nanjing 210023,China;Jiangsu Beidou Satellite Application Industry Research Institute Co Ltd,Nanjing 210032,China;School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China;School of Transportation,Southeast University,Nanjing 210096,China)

机构地区：[1]南京工业职业技术学院电气工程学院,江苏南京210023 [2]江苏北斗卫星应用产业研究院有限公司,江苏南京210032 [3]东南大学仪器科学与工程学院,江苏南京210096 [4]东南大学交通学院,江苏南京210096

出　　处：《测绘工程》2018年第8期1-6,12,共7页Engineering of Surveying and Mapping

基　　金：江苏省智能传感器网络工程技术研究开发中心开放基金(BE2016176)

摘　　要：随着Galileo、BDS的建设和GPS的发展完善,多系统多频融合的趋势促进了多模GNSS接收机产业化应用。利用零基线双差法对GPS/Galileo/BDS双频观测值进行测距信号精度评估,通过24h的观测数据分析,结果表明Galileo IOV卫星双频观测值残差值最小,测距信号精度最优,其次是BDS;Galileo与BDS系统载波相位观测精度均优于2mm,伪距观测精度优于0.2m,GPS系统测距信号精度相对较差。同时,通过对比Trimble NET R9、Septentrio POLARX4及Javad TRE_G3TH_8三种不同类型接收机间观测值残差及基线坐标偏差,得出NET R9和POLARX4接收机内部噪声水平相当,TRE_G3TH_8稍差的结论。With the continuous development and improvement of Galileo,BDS and GPS,multi-mode GNSS receiver has been promoted by the integration of navigation satellite system.In this paper,a zero-baseline test method is conducted to assess the signal precision on double frequencies from GPS/Galileo/BDS,by analysis of 24 hours’test data.The result indicates that the residual value of the Galileo IOV satellite is the smallest,and the accuracy of the ranging signal is the best,then followed by BDS.The carrier phase observation accuracy of Galileo/BDS is better than 2 mm,while pseudorange observation accuracy is better than 0.2 m,and the accuracy of GPS is relatively poor.In addition,the noise level of different kinds of receivers is also been analyzed by comparing observation residuals and the 3D coordinate deviation.The experimental results show that the internal noise levels of Trimble NET R9 and Septentrio POLARX4 receivers are comparable,while JAVAD TRE_G3TH_8 receivers is relatively poor.

关 键 词：零基线双差法 双频 测距信号 内部噪声水平 精度分析 

分 类 号：P228.1[天文地球—大地测量学与测量工程]