GPS网与天文大地网坐标系统的转换方法

Method of Coordinate Transformation Between GPS Network and Terrestrial Network

针对我国天文大地网精度的现状 ,提出一种建立GPS网与天文大地网坐标系转换的网格转换方法。该方法把我国范围划分为 5°× 5°网格 ,对于每个网格点用其四周 4个网块的重合点数据以多项式回归的方法分别建立经度、纬度和高程 3个分量的转换关系。算例表明 ,该文方法所建立的转换参数的内部符合精度 ( 1 90个重合点 )水平分量达 0 .4m、高程分量达 0 .8m。

This paper gives a method of coordinate transformation of GPS network and terrestrial network according to the present situation of our terrestrial network. The method divides the area of all country into 5°×5° grid network, and model longitude, latitude and height component transformation parameters in each grid using the common point's data from four blocks surrounding the grid by multiple regression equations. The example indicates the transformation accuracy up to 0.4 meter in plane 0.8 meter in height component.