基于三维移动变形平台的GPS/BDS中长基线解算性能分析  

Performance Analysis of Medium-Long Baseline Solution in GPS/BDS System Based on 3D Mobile Deformation Platform

作　　者：徐炜 余学祥 贾雪 严超 王涛[4] XU Wei;YU Xuexiang;JIA Xue;YAN Chao;WANG Tao(School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;School of Geodesy and Geomatics, Anhui University of Science and Technology, 168 Mid-Shungeng Road, Huainan 232001, China;College of Instrument Science and Engineering, Southeast University, 2 Sipailou, Nanjing 210096, China;Land and Resources Bureau of Jinzhai County, Jinzhai County, Lu’an 237300, China)

机构地区：[1]武汉大学测绘学院,武汉市430079 [2]安徽理工大学测绘学院,安徽省淮南市232001 [3]东南大学仪器科学与工程学院,南京市210096 [4]金寨县国土资源局,安徽省六安市237300

出　　处：《大地测量与地球动力学》2019年第9期934-941,共8页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41474026);淮南矿业(集团)有限责任公司项目(HNKY-JTJS(2018)-178,HNKY-JTJS(2017)-122,HNKY-JTJS(2013)-28)~~

摘　　要：针对中长基线解算测站间的大气误差无法通过双差完全消除、影响模糊度的固定与精度的问题,在得到宽巷模糊度后,利用Kalman滤波算法对 L 1、B 1 基频模糊度进行估计,并使用LAMBDA算法确定基频模糊度。以三维移动变形平台中长基线实测数据为例,解算GPS、BDS、GPS/BDS系统3种模式下的数条中长基线。总体而言,GPS/BDS组合系统较单GPS、BDS系统精度有所提升,GPS/BDS组合系统各基线固定率、正确率优于82.08%、81.53%, X、Y、Z、 3D方向的精度可达15.4 mm、15.9 mm、20.1 mm、30.0 mm;20.8 km、 46.6 km基线三维移动变形中误差分别优于18.8 mm、22.5 mm,相对中误差分别优于 1/71.9、 1/60.1。In the middle-long baseline solution, the atmospheric error between stations cannot be completely eliminated by double difference, which affects the fixing and precision of ambiguity. After obtaining the wide lane ambiguity, this paper uses a Kalman filter algorithm to estimate the ambiguity of L 1 and B 1 fundamental frequency, and uses LAMBDA algorithm to determine the ambiguity. Taking the medium-long baseline measured data of three-dimensional mobile deformation platform as an example, several long and medium baselines under three modes of GPS, BDS and GPS/BDS are calculated. Overall, the precision of GPS/BDS integrated system is improved to a certain extent, as compared with single GPS and single BDS. The fixing and correction rates of each baseline of GPS/BDS integrated system are better than 82.08% and 81.53%, the precision of X, Y, Z can reach 15.4 mm, 15.9 mm and 20.1 mm, and the 3D direction accuracy can be better than 30.0 mm. In 20.8 km and 46.6 km baselines, the median errors can be better than 18.8 mm and 22.5 mm respectively, and the relative median errors are better than 1/71.9 and 1/60.1 respectively.

关 键 词：GPS/BDS 中长基线 宽巷模糊度 基频模糊度 KALMAN滤波 

分 类 号：P228[天文地球—大地测量学与测量工程]