区域似大地水准面的二次精化及其软件实现

The re-refinement and software realization for local quasi-geoid

为了满足区域重力调查高精度测地工作的要求,实现不同坐标系之间的转换,通过区域似大地水准面的二次精化方法及开发的软件,将GPS大地高转换到正常高。采用实测26个水准点外检核精度,全区软件转换精度为±5.57 cm,完全满足重力测量中高程精度要求。

In order to realize the high precision surveying in regional gravity survey as well as the transformation of different systems of coordinates, this paper describes a method for refining the local quasi-geoid and develops software to realize conversion from the GPS geodetic height to normal height. The conversion precision is ~5.57 cm by the external check using 26 benchmarks, which can completely meet the requirements of elevation precision in gravity survey.