国家大地网

综观各国的大地测量动向可以看出，高精度国家大地控制网的建立，都是采用GPS，无一例外，而且它们之间只是细节上的差异。

A comprehensive review of these activities shows that the establishment of national high accuracy geodetic networks is all made by means of GPS without exception , they exhibit only slight difference in details .

2000国家大地控制网的构建和它的技术进步

Establishment of 2000 National Geodetic Control Network of China and It 's Technological Progress

2000国家大地控制网是国家大地测量的重大科学工程项目。

2000 ' National Geodetic Control Network of China is an important fundamental scientific engineering project in China .

2000国家GPS大地控制网的数据处理和精度评估

Data processing and accuracy analysis of national 2000 ' GPS geodetic control network

它主要包括建立2000国家GPS大地控制网，2000国家重力基本网，以及前者与国家天文大地网的联合平差等，以实现国家3维地心坐标系统的坐标框架。

It consists of three parts which are establishment of 2000 National GPS Geodetic Network , its combination adjustment with national astro-geodetic network and 2000 National Gravity Fundamental network .

为此，应对GPS2000网进行加密和改造，才能作为国家现代大地控制网。

As a result , the GPS2000 network must be encrypted and reformed in order to be used as National modern geodetic network .

国家2000GPS大地控制网加密方案的探讨

Discussion on point-densifying plan of national ' 2000 GPS geodetic network

建立国家现代大地控制网的探讨

Discussion on National Modern Geodetic Network