GPS拟合高程建立和精化山区大地水准面应用探讨

Discussion of applying GPS elevation fitting to establish and refine the Geoid of mountainous area

本文在分析大地水准面精化的目的意义及其发展现状的前提下,阐述了确定(似)大地水准面的原理,并针对贵州山区重力资料缺乏的现实情况,探讨了确定和精化山区局部区域大地水准面的方法;尤其对在贵州山区局部区域范围运用GPS水准资料结合地球重力场模型EGM96,拟合区域大地水准面的方法进行了详细的分析和讨论。通过运用原理和方法对实例的应用,说明了这些方法的适用范围,得出了一些有益的结论。

Geoid refining is not only important for the surveying and mapping science,but also has positive effects on earth science researches.The paper elaborated the principle of defining the quasi-geoid or geoid by analyzing the meaning of geoid refining and its present development;explored measures of defining and refining geoid in mountainous regions under conditions of shortage of gravity materials in Guizhou mountainous area,especially analyzed and discussed the measure of combining GPS standard data with earth gravity model EGM96 to fit regional geoid in detail.Finally it clarified the scope of applying the principle and measures through applying principle and measures in practice,and put forward some useful conclusions.