摘要
局部大地水准面精化的实质是精确计算出大地水准面的起伏变化情况。一般情况下,需要密度足够的重力数据,依重力异常密集计算大地水准面差距或高程异常。但是在大陆西部高原山区重力点密度是不够的,无法达到大地水准面精化的目的。本文从理论上证实了用地形和岩石密度数据进行局部大地水准面精化的可行性。
In essence, local geoid refined can calculate geoid undulations changes precisely. Under normal circumstances, sufficient density of gravity data is used to calculate geoid gap or height anomaly according to gravity anomaly intensive. However, in the mountains of west, the gravity point plateau density is not enough to attain the geoid refinement. In this paper, it is confirmed that the implementation of the terrain and rock density data for local geoid refined is feasible theoretically.
出处
《测绘科学》
CSCD
北大核心
2008年第5期60-61,59,共3页
Science of Surveying and Mapping
关键词
大地水准面
挠动位
垂线偏差
quasi - geoid
disturbing potential
deflection of the vertical
