剥蚀法计算GPS观测网独立环闭合差

Denudation Method for Computing Independent Loop Closure of GPS Net

在GPS测量中，往往需要计算三角形、多边形闭合差，以便及时发现观测粗差、衡量GPS观测精度。本文提出了剥蚀法计算GPS观测网独立环闭合差，这种方法利用计算机自动确定观测网中的独立环个数，并计算所有独立环闭合差。它适合各种复杂的观测图形，所计算的独立环个数是唯一的，独立环为观测网中的最小闭合单元，并且环与环之间不出现包含和重复。

In GPS surveying, we usually need to compute closure difference of triangle or polygon, so as to search surveying gross errors and estimate GPS observing precision． This paper put forward a method called Denudation Method to compute independent closure of GPS net． It can automatically calculate the number of independent loop of observation net by computer, moreover can compute their closure． This method can be used in all kinds of complicated observation figures． The counted number of the independent loops is unique, and each of all loops is the least close unit in GPS net, and there is not cover and repeat between two loops．