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.

• 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。