物化探测地工作采用GPS定位时进行高程异常改正的研究探讨

A study on the elevation anomalous rectify by using GPSpositioning to geophysical prospecting, geochemicalexploration and geodetic surveying

本文叙述了我国现行高程系统与GPS高程系统的区别,介绍了GPS求解的大地高转换为正常高的几种方法,具体提出了1:20万区域重力调查中用GPS定位时所求测点高程应进行高程异常改正及高程异常对区域重力调查精度的影响。对区域重力调查及其它物化探测地工作有一定的指导意义。

A distinction between present elevation system and GPS elevation system is made in this paper. Some methods are introduced, i. e. changing the GPS geoid elevation into the measured elevation. It is concretely proposed that for the height of station measured by using GPS positioning in the regional gravity surveying (1:200 000) the height anomaly. Meanwhile, it is also described that how the height anomaly effect the precision regional gravity surveying, geophysical prospecting, geochemical exploration and geodetic surveying.