摘要
根据高精度GPS变形监测的特点 ,介绍了单历元解算监测点变形量的似单差数学模型及其算法 .该算法不涉及周跳的探测与修复、双差整周未知数的解算等棘手问题 ,适用于同步观测卫星数不少于 2颗的情况 .为提高单历元解算变形信息的可靠性 ,在分析算法的基础上 ,构造了实现对卫星进行自动选择的抗差估计模型 .3个不同测区的试验数据计算结果表明 ,本文建立的似单差模型是正确的 ,采用抗差估计方法来选择卫星也是可行的 .
According to the characteristics of the high precise GPS (global positioning system) deformation monitoring,the similar single-difference mathematical model and its algorithm for solving the GPS monitor points deformation information at the single epoch is introduced in this paper. The troublesome problems of detecting and repairing cycle slips, as well as the solution of double difference ambiguities,are avoided.This model can be used to the circumstances that the number of satellites to be syncronously monitored are not less than two.In order to improve the reliability of the deformation information solved by this model, the robust estimation model for choosing the satellites automatically is build based on analyzing the similar single-difference algorithm. The computed results of the test data from three different survey areas show that the similar single-difference model is correct and using robust estimation to choose satellites is practicable.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第5期618-622,共5页
Journal of Southeast University：Natural Science Edition
基金
国土资源部资助项目 (2 0 0 2 10 10 2
2 0 0 3 170 9)
安徽省教育厅自然科学研究计划资助项目 (2 0 0 4KJ113 ) .
关键词
GPS监测
单历元
变形信息
似单差模型
抗差估计
GPS monitoring
single epoch
deformation information
similar single-difference model
robust estimation
