摘要
采用地心坐标系作为大地基准是国际测量界的总趋势。论文详细介绍了2008年7月1日启用的中国三维地心坐标系CGCS2000的定义及其实现,给出了采用参考椭球的定义常数和导出常数,将CGCS2000与WGS84进行了比较,分析了椭球扁率变化引起的同一点在两种坐标系下大地坐标和两种椭球面上正常重力、正常重力垂直梯度的差异。
It is a general trend to adopt the geocentric coordinate system as a geodetic datum for the international measurement commu- nity. The definition and realization of Chinese geocentric three-dimensional coordinate system （CGCS2000） which has been employed since July 1st, 2008 are introduced in detail. The defining parameters and derived constants of the reference ellipsoid used are given. The differences of geodetic coordinate of a point between the two coordinate systems, normal gravity and vertical gradient of normal gravity on the two ellipsoids caused by the change of the flattening of the ellipsoid are analyzed.
出处
《舰船电子工程》
2013年第8期19-21,共3页
Ship Electronic Engineering
基金
973计划资助(编号:2012CB719902)
国家自然科学基金(编号:41071295
41201478)资助项目
