利用GPS精化区域似大地水准面

REFINING LOCAL QUASI GEOID WITH GPS

基于原有似大地水准面,在区域设计一些具有高精度的GPS大地高和水准高的公共点,采用数学拟合方法可得该区域似大地水准面的精化模型。由精化后的似大地水准面可得到区域内任一GPS测点的水准高程,从而代替五等水准测量和三角高程测量。

By designing some points with high precision GPS-height and leveling-height in the studied region,the refined model of quasi geoid based on the existent one can be obtained with the method of mathematical simulation. From the refined quasi geoid, the leveling-height of any GPS point in the region can be obtained instead of fifth order leveling and triangulated height surveying.