摘要
分析了国家高精度ＧＰＳ网中的粗差观测量的特点，提出了采用相关分析的粗差探测理论，对国家高精度ＧＰＳ网的各子网和相邻子网进行粗差探测，并采用稳健估计的平差方法，消除粗差对平差结果的影响，大大提高了国家高精度ＧＰＳ网的整体平差精度。
The national high precision GPS network for geodetic control is surveyed from 1991 to 1997. The GPS observation data are processed by GAMIT software. GAMIT baseline solution are used as observations for integrate adjustment. In this case the outlier baseline is very difficult to find out from 4 935 independent baselines. This paper uses correlation analysis theory to snoop the outliers. In the adjustment the outliers are kept but down weighted. This theory can find out multi outliers in correlative observations, and reduce the influence of the outliers. This paper also gives the step and principle for this outlier analysis theory. And gives the comparison of the result of the national high precision GPS network with outlier analysis.
出处
《武汉测绘科技大学学报》
CSCD
1999年第2期107-111,共5页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金
关键词
精度
GPS网
粗差分析
相关分析
整体平差
national high precision GPS network
outlier analysis
correlation analysis
robust estimation
