SDCORS高精度数据处理子网划分分析

Sub-network Division Analysis in the High-accuracy Data Processing of SDCORS

基于SDCORS站点数目较多、网络较复杂的特点,提出利用GAMIT/GLOBK软件采用划分子网的方案对SDCORS站的观测数据进行解算。将整网的单天解算结果作为标准值,把各方案与整网解算方案的解算结果进行对比,以此来选出更为合理的划分方案。结果表明,无论是按照方向(东中西三部分、南中北三部分、东西两部分、南北两部分)划分子网还是按照接收机类型划分子网的方案,均可提高解算效率,解算精度在mm级。将各方案的基线精度与整网的精度比较,得到的基线相对精度在10-8量级,能够满足高精度测量要求,其中,采用南北划分的方案得到的点位较差均在2.5mm内,效果最好。

Based on the characteristics of SDCORS＇ s large quantity and complex net- work, five sub-network division schemes are proposed to process observation data of SD- CORS using the GAMIT/GLOBK. The one-day result of the whole network solution scheme is served as a standard, and five sub-network division schemes are compared with the whole network solution scheme to choose the better one. Whether the scheme is in accordance with the direction （east-middle-west three sub-networks, south-middle-north three sub-networks, east-west two sub-networks, south-north two sub-networks） or according to the type of re- ceiver to divide sub-network, the results showed that every scheme can improve efficiency and reach the level of mm accuracy. What＇s more, comparing the baseline accuracy of each divi- sion scheme with the whole network solution scheme, the relative accuracy of the baseline may achievel0-Slevel, which can meet the requirement of high-precision measurement. The point difference was within 2.5mmwith the south-north sub-network division scheme, achie- ving the highest accuracy.