摘要
为了减弱BDS-3/GPS基准站数据处理中电离层延迟的影响,从而提高基准站坐标解算精度,采用BDS-3/GPS双频载波无电离层线性组合消除电离层延迟一阶项的影响,并引入全球垂直总电子含量VTEC文件削弱电离层延迟高阶项的影响。通过设计对比实验对24个MGEX基准站进行解算,分析了BDS-3和GPS解算过程中电离层延迟高阶项对长基线网解精度的影响。解算结果表明:BDS-3和GPS定位精度基本相当,且在顾及电离层延迟高阶项后,基准站坐标定位在E、N和U方向均有1 mm左右的精度提升,BDS-3坐标E、N和U方向分别提升8.5%、9.1%和6.2%;GPS坐标E方向提升不明显,N和U方向分别提升11.4%和4.3%。
In order to reduce the influence of ionospheric delay in BDS-3/GPS reference station data processing, thereby improving the accuracy of the reference station coordinate calculation, the BDS-3/GPS dual-frequency carrier ionospheric-free linear combination is used to eliminate the influence of the first-order ionospheric delay term, and use the global vertical total electron content VTEC file to weaken the impact of higher-order terms of ionospheric delay. By designing and comparing experiments, 24 MGEX reference stations are calculated, and the influence of higher-order ionospheric delay on the accuracy of the long-baseline network solution in the BDS-3 and GPS solution process is analyzed. The calculation results show that the positioning accuracy of BDS-3 and GPS are basically equivalent, and after taking into account the high-order terms of ionospheric delay, the accuracy of the reference station coordinate positioning in the E,N and U directions is improved by about 1 mm. The BDS-3 coordinate The E,N,and U directions are increased by 8.5%,9.1%,and 6.2%,respectively;the GPS coordinates in the E direction are not significantly improved, and the N and U directions are increased by 11.4% and 4.3%,respectively.
作者
李勇熹
程鹏飞
徐彦田
王楚扬
常春涛
刘艳辉
LI Yongxi;CHENG Pengfei;XU Yantian;WANG Chuyang;CHANG Chuntao;LIU Yanhui(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China;Beijing Fangshan Satellite Laser Ranging National Observation and Research Station,Beijing 102488,China;Ministry of Natural Resources,Beijing 100812,China;School of Geomatics,Liaoning Technical University,Fuxin,Liaoning 123000,China;The First Geodetic Surveying Brigade of Ministry of Natural Resources,Xi’an 710054,China)
出处
《测绘科学》
CSCD
北大核心
2022年第1期59-65,共7页
Science of Surveying and Mapping
基金
高分辨率对地观测系统重大专项(42-Y20A09-9001-17/18)。
