济南市高精度似大地水准面的确定

Determination of Quasi-geoid with High Precision in Jinan

采用移去-恢复技术计算了济南市2.5'×2.5'分辨率的重力似大地水准面,并和布测的78个GPS/水准点所构成的高程异常控制网拟合,得到该区域的似大地水准面模型,将该模型似大地水准面高与由37个GPS/水准得到的似大地水准面高进行比较,其差值的标准差为±1.8 cm。

The gravitational quasi - geoid with 2.5 arc minute resolution is computed with remove - restore tech- nique. The quasi - geoid has been finished finally by fitting with the GPS quasi - geoid, constructed with 78 GPS/level- ing production. The modeled quasi - geoid were compared with the observed ones derived from 37 GPS/leveling data not applied to construction of Jinan quasi - geoid. The test results show that the standard deviation of the differences is ± 1.