信号与噪声权选择对GPS高程拟合精度的影响  

Study on Effect of Choice of Signal and Noise of the Right on GPS Elevation Fitting Accuracy

作　　者：魏玉明[1,2] 张永志[1] 王帅[1] 姜永涛[1] 

机构地区：[1]长安大学地质与测绘学院,西安市雁塔路126号710054 [2]兰州理工大学土木工程学院,兰州市兰工坪路287号730050

出　　处：《大地测量与地球动力学》2016年第3期226-228,243,共4页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41374028;40674001);甘肃省自然科学基金(1508RJZA094);甘肃省建设科技攻关项目~~

摘　　要：阐述了最小二乘配置基本原理,给出在吉洪诺夫条件下的最小二乘解和一种新的确定经验协方差的方法,并通过实例讨论信号与噪声权的选择对GPS高程拟合精度的影响。结果表明,随着信号与噪声权比的增大,内符合精度明显提高,检核精度也有一定的提高。The basic principle of the least squares collocation is expounded and the solutions are given under the conditions in Tikhonov,and a new a priori variance-covariance estimation method is shown.Finally,the influence of signal and noise in the right choice for GPS elevation fitting precision is analyzed through an example.Our research shows that,with the increase of the ratio of signal and noise power,the accuracy of fitting is obviously improved and the accuracy of checking is improved to some extent.

关 键 词：最小二乘配置 方差-协方差 误差 高程异常拟合 精度 

分 类 号：P228[天文地球—大地测量学与测量工程]