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

   Based on the characteristics of SDCORS’s large quantity and complex network, five subnetwork division schemes are proposed to process observation data of SDCORS 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 receiver 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 division scheme with the whole network solution scheme, the relative accuracy of the baseline may achieve10^-8level, which can meet the requirement of highprecision measurement. The point difference was within 2.5 mmwith the southnorth subnetwork division scheme, achieving the highest accuracy.