我国建立现代大地基准的思考

提出了现代大地基准要考虑和顾及高精度、涵盖全部国土、三维、地心、动态、国际接轨等6个要素。建议在国家GPS2000网的基础上，进一步加密GPS网点和永外性跟踪站，构建有足够数量和密度合理分布的新的大地坐标框架点。现代大地基准应为用户在我国任何地点、任何时间测定高精度的三维地心坐标提供可靠的地理空间基础框架。

On the Establishment of Chinese Modern Geodetic Coordinate System

Considering the rapid development and wide popularization of space and information technology,the question what kinds of concept and techniques should be updated or introduced in the modern geodetic coordinate system is discussed in this paper.The following six elements are suggested to be the marks of a modern geodetic coordinate system in China,i.e.precision,cover whole Chinese territory,three dimensions,geocentric,kinematics,integrate with the international conventional reference system.It is necessary to densify GPS stations and GPS continuous operation stations in the GPS2000 network in order to have enough distributed density of Chinese geodetic coordinate frame.The Chinese modern geodetic coordinate system should provide a reliable,suitable geographical spatial fundamental reference frame for the coordinate determination in any time,at any place of China.