摘要
拟建的国家重力基本网由 10 0个点组成 ,其中有 15个基准点 (绝对重力点 )、85个基本点 (相对重力点 ) ,近 2 0 0条测线。本文首先对初始设计方案进行了评估 ,然后根据精度、可靠性、费用等优化目标提出了重力网优化设计需顾及的几条原则。在图形优化设计中 ,用模拟法计算 ,删除了部分对精度贡献不大的测线 ,得到一个略低于精度要求的设计方案。在此基础上分别用解析法和模拟法进行二级优化设计 ,重新分配观测值的权 。
The national gravity network to be built is composed of 100 points,15 absolute gravity points and 85 relative gravity points,and nearly 200 observations.This paper evaluated the primary scheme firstly.Considered the target of optimization design for precision,reliability and cost,some principles that were suitable for gravity network designing were proposed.During the first order optimal designing,the simulative method was used to find and delete the observation which had little influence on the precision of the network.After that we got a scheme whose precision was little lower than that of being required.Based on this plan we used the analytic method and simulative method to do the second order optimal design and got tow schemes.Both of the schemes satisfied the requirement of precision and had a higher reliability and a lower cost relatively.
出处
《武汉测绘科技大学学报》
CSCD
2000年第6期496-499,共4页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目!(497742 12 )
国家测绘局测绘科技发展基金资助项目!(980 0 9)
测绘遥感信息工程国家重点实验室开放研究
关键词
重力网
优化设计
解析法
模拟法
gravity network
optimization
analytic method
simulative method
