DATA PROCESSING IN PRECISION SURVEYING OF BALLASTLESS TRACK HIGH-SPEED RAILWAY
Cai Shiyi 1) ;Li Bofeng 1) ;Shi Debin 2) ;Liu Cheng 2) ; and Shen Yunzhong 1，3)
1)Department of Surveying and Geoinformatics, Tongji University, Shanghai 2000922Dept. of Remote Sensing and Surveying and Mapping of the Third Surveying and Design Institute Ltd. Co., Tianjin 3002513)Key Laboratory of Advanced Surveying Engineering,SBSM, Shanghai 200092
Abstract：A data processing method for the precision surveying of ballastless track highspeed railway is put forward:first, choosing the compatible points in the control network by quasistable adjustment, then, adjusting the control network with the adjustment model of indirect observation in which the Baarda gross errors detection and Helmert variance component estimation are used. This kind of software for precision surveying data processing has been developed and tested by use of real surveying data. The data processing results show that the adjustment accuracy and reliability of the control network can be improved with this method.
