实时动态GPS测量转换参数求解分析

Analysis for Transformation Parameter of Real-time Kinematic GPS

随着GPS测量技术的不断进步,目前动态GPS技术,特别是实时动态载波相位差分(RTK)技术,已成为GPS测量技术发展中的一个新的突破。但由于GPS测量采用WGS-84坐标系统,而我国目前所采用的坐标系统为1954北京坐标系(或1980国家大地坐标系、地方坐标系统等),高程基准为1956年青岛黄海高程系(或1985国家高程基准),所以GPS-RTK测量时必须先求解转换参数,以便于测量成果的应用。转换参数的求解是RTK测量的基础,转换参数的精确程度是影响RTK测量精度的关键因素。

Along with the GPS surveying technique＇s unceasing progress, the dynamic GPS technology, specially the technology of real-time dynamic carrier phase difference （RTK）, has become a new breakthrough in the GPS surveying technique. But because the GPS survey uses the WGS-84 coordinates system, but the coordinate system using in our country is 1954 Beijing coordinate systems （or 1980 national earth coordinate system, local coordinates system etc）, the elevation datum is Qingdao Yellow Sea elevation of 1956 （or national elevation datum of 1985）, therefore GPS-RTK survey must solve the transformation parameter firstly, so that we can use the surveying achievement. The transformation parameter＇s solution is the foundation of RTK survey, the transformation parameter＇s precise degree is the key aspect affecting the RTK surveying accuracy.