利用重力场模型和局部重力资料计算GPS水准高的精度探讨

An Approach to the Precision of Computing the GPS Levelling Heights Using Gravity Field and Local Gravity Data

利用大地水准面高，结合ＧＰＳ测量的高程信息，直接计算ＧＰＳ水准高，是一种全新诱人的解决方案。本文就这种方案，根据其核心技术──大地水准面高的性质：长波长－全球重力场；中波长－局部重力资料；短波长－数据地形，对它的具体实现、适用范围以及精度分析作了详尽的探讨，在此基础上，提出一些ＧＰＳ水准应用规范和要求。

Directly computing the GPS Levelling heights using the geoid heights and GPS height infor- mation is a wholly new and charming solution. Based on the key technique of this solution, the proper- ties of the geoid heights (including long wave length-global gravity field, medium wavelength -local gravity data and short wavelength data topography), the paper discusses in detail the actualization, appli- cation scope and precision analysis of the method. On the basis of that, some applied specifications and requirements for the GPS levelling are put forward, and testing and verifying are carried out with the experiental data.