Determination of CGCS2000 coordinates of reference stations along railway lines based on whole network solution and region solution
Based on control surveying or monitoring requirements of the existing high-speed railway lines,continuously operating reference stations (CORSs) with satellite navigation were arranged along the railway line as a control datum. For monitoring of long railway lines,the whole network solution and the region solution were used to compare the coordinate difference of the CORSs along the railway line,and various comparison methods were designed. The research results show that there is little difference between the whole network solution and the region solution in calculating the coordinates along the railway line under the International Terrestrial Reference Frame (ITRF) 2020. For the coordinate calculation result of CORSs under the China Geodetic Coordinate System 2000 (CGCS2000) frame,the difference between them is mostly within the range of frame conversion accuracy,but there are still 12％ points with a larger difference,which exceeds twice the conversion error under CGCS2000 frame. In the actual calculation,it is necessary to consider the difference between the whole network solution and the region solution.
International Terrestrial Reference Frame (ITRF)China Geodetic Coordinate System 2000 (CGCS2000)reference station with satellite navigation
万方数据
维普
