摘要
我国GPS规范对环闭合差的检核方法是对三维坐标分量分别检验,而美国Trimble GeomaticsOffice(TGO)软件对环闭合差的检核方法是对水平分量和垂直分量进行检验,如何确定水平分量限值和垂直分量限值是应用TGO软件执行国家规范的重要问题。本文基于GPS网环闭合差三维坐标分量限值相等的前提,从理论上推证出水平分量限值和垂直分量限值的确切比例关系;还通过实例分析讨论了限差取值问题,提出了更切合实际的环闭合差检核限差的取值建议。
China＇ s national GPS code stipulates that the loop closure test must be checked by 3-D coordinate component separately. However the method provided by Trimble Geomatics Office （TGO） software is inspected by horizontal or vertical component. Thus, how to determine the limit value of horizontal or vertical component is a key point in implementation of this national code when using TGO software. Based on equal limit value of 3-D coordinate component, this paper derives the definite relation formula for horizontal component or vertical one. And through case study discussion, the limit value suggestion which is closer to given. reality for loop closure is also given.
出处
《工程勘察》
CSCD
北大核心
2006年第7期45-47,50,54,共5页
Geotechnical Investigation & Surveying
关键词
TGO
环闭合差
三维坐标分量
水平分量
垂直分量
TGO
loop closure
3-D coordinate component
horizontal component
vertical component
