电离层二阶项改正对BDS精密单点定位的影响  

Impact of second-order ionospheric delay for BDS precise point positioning

作　　者：徐宗秋[1] 黄天舒 徐爱功[1] 徐彦田[2,3] 赵全哲 XUZongqiu;HUANGTianshu;XUAigong;XUYantian;ZHAOQuanzhe(School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;Chinese Academy of Surveying and Mapping,Beijing100036,China;Key Laboratory of Surveying and Mapping Science and Geospatial Information Technology of Ministry of Natural Resources,Beijing 100036,China;Liaoning MaptechInc.,Shenyang110000,China)

机构地区：[1]辽宁工程技术大学测绘与地理科学学院,辽宁阜新123000 [2]中国测绘科学研究院,北京100036 [3]自然资源部测绘科学与地球空间信息技术重点实验室,北京100036 [4]辽宁宏图创展测绘勘察有限公司,沈阳110000

出　　处：《测绘科学》2022年第12期8-15,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42074012,42030109);辽宁省重点研发计划项目(2020JH2/10100044);辽宁省“兴辽英才计划”项目(XLYC2002101,XLYC2008034,XLYC2002098);自然资源部测绘科学与地球空间信息技术重点实验室经费资助项目(2020-1-1)

摘　　要：为了提高北斗卫星导航系统(BDS)全面建成后的精密单点定位(PPP)的定位精度,电离层二阶项对BDS PPP的影响值得进一步研究。该文利用PRIDE-PPPAR软件处理了全球分布的20个MGEX站观测数据,研究了不同纬度地区、不同电离层活跃程度下电离层二阶项对BDS静态和动态PPP的影响。实验结果表明,电离层二阶项改正使定位结果南偏,纬度越低南偏影响越明显。电离层活跃程度越高,电离层二阶项改正对E方向定位结果的影响越大。在电离层活跃时期,电离层二阶项改正引起的静态PPP和动态PPP最大定位偏差通常出自低纬度地区的测站。对电离层活跃时期的低纬度地区测站进行电离层二阶项改正,在一定程度上能提高BDS PPP定位精度。In order to improve the precise point positioning(PPP)positioning accuracy after the completion of BeiDou navigation satellite system(BDS),the influence of second-order ionosphere error needed to study.In this paper,the influence of second-order ionosphere error on static and kinematic PPP of BDS with different latitude and varied ionospheric environments had been studied by PRIDE-PPPAR.With 20 MGEX station observations,the results showed that the second-order ionosphere error affected the positioning results with bias on south direction.The higher the active degree of ionosphere,the greater the influence of second-order ionosphere error in E.When the ionosphere was active,the maximum deviation of static and kinematic PPP usually occurred at stations at low latitudes.At low latitudes,correction of second-order ionosphere error could improve positioning accuracy in general during the ionosphere activity.

关 键 词：BDS 精密单点定位 电离层 电离层二阶项 定位精度 

分 类 号：P228[天文地球—大地测量学与测量工程]