控制点CGCS2000坐标的联测及解求

Conjunction measurement and solution on CGCS2000 coordinate of control points

CGCS2000坐标系是我国目前精度最高的坐标系,其推广使用具有重大意义。文中在安装并学习美国高精度GPS基线处理软件GAMIT软件基础上,以4个无坐标信息观测墩为例,进行观测数据采集与数据处理方案的设计,以期获取4个观测墩的CGCS2000坐标。最终结果表明,各质量指标均满足限差要求,且平差后最弱边中误差满足《工程测量规范》(GB50026-2007)三等工程控制网的要求。

CGCS2000 coordinate system was the most accurate coordinate system in our country,it was of great significance to promote and use.In this paper,taking four observation piers without coordinate information as an example,the observation data collection and the data processing plan were designed to obtain CGCS2000 coordinate of four observation piers based on installing and learning GAMIT software that it was the high-precision GPS baseline processing software in American.Final results showed that all the quality indicators could meet the requirements of the limit difference,and the medium error of the weakest margin after adjustment could meet the requirements of the third-class engineering control network of the“Engineering Survey Specification”(GB50026-2007).