物理大地测量的主要目标是确定地球外部重力场和大地水准面。
The main purpose of physical geodesy is to ascertain the outer Earth gravity field and geoid.
讨论了应用GPS测量重力点的大地高，从而获得地面点的扰动重力（或称纯重力异常）值这样新的重力边值条件，如何从理论与实际上确定重力场的问题。
This paper discusses the problem of gravity field determination by application of such a new gravity boundary condition as the disturbing gravity by use of GPS.
上述的测量极大地改善了我国目前重力网的精度和覆盖率，并为研究重力场的变化提供了重要的基础资料。
The above efforts significantly improve the present precision and distribution of Chinese national gravimetry network, and also provide important basic data to the study on gravity field variation.
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