大规模GNSS基准站网坐标解算方法研究

针对数千个大规模GNSS基准站网基准坐标解算时面临的数据处理和整网平差难题,本文提出一种大规模GNSS基准站网坐标解算方法,从全球框架站点选取、基准站网子网划分、基站单日数据处理和全球整网平差计算4个方面进行了阐述,最后对解算结果进行内符合和外符合精度评估.结果表明,该方法支持3000站以上的基准坐标解算,解算结果外符合精度南北和东西方向RMSE优于3mm,高程RMSE优于6mm,解算精度相比IGS(国际GNSS服务组织)各分析中心属于中上水平.

Solving coordinates of GNSS reference station network

In view of the difficulties in data processing and adjustment of coordinate calculation perplexed large-scale GNSS reference station network,this paper proposes a coordinate calculation method.The method is elaborated in four aspects including selection of global framework sites,division of reference station network subnets,single-day data processing of base stations,and global network adjustment calculation.Finally,the internal and external consistence accuracies of the calculation results are evaluated.The analysis results show that the method can solve reference coordinates for network with more than 3 000 stations,and the RMSE of the results is better than 3 mm in both north-south and east-west directions,and better than 6 mm in elevation.The accuracy of the calculation is higher than those of most IGS analysis centers.