| GPS水准 |
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| 引用本文： | 江志恒.GPS水准[J].测绘科学,1991(Z1). |
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| 作者姓名： | 江志恒 |
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| 作者单位： | 国家测绘局测绘研究所 |
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| 摘 要： | 本文根据国内外GPS水准研究的文献资料,结合作者的研究心得,分析、探讨了各种GPS水准的理论与方法。比较其特点和应用条件及有待深入研究的课题。本文共分三部分;第一部分先说明GPS水准概念,然后探讨了GPS大地高(差)的精度及GPS水准——几何法求定大地水准面的各种算法;第二部分讨论了如何应用重力资料精化大地水准面的几何解;第三部分介绍了国内外一些重要的试验结果,以使读者有一明确的数字概念。
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GPS Levelling |
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| Abstract: | Based on the studies and experiments available on GPS levelling, the auther discussed various theories and methods, by which, the orthometric height can be determined by the combination of GPS technique and gravimetrie solution without using traditional precise levelling. This paper is divided into three parts: the first part is mainly about the idea of GPS levelling and its geometric method, the second part deals with gravimetric method, the third part introduces some results of GPS levelling experiments.
It is concluded that 5～10ppm, the relative accuracy, can be reached in flat area by geometric means, the same accuracy can be got with gravity data in mountainous area, and by acombined adjustment, using the two parts of observations mentioned above a better result with the accuracy of 2～3ppm could be expected. It is possible that some jobs done by traditional precise levelling would be then taken over by GPS leveuing in the coming future in china. |
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