坐标转换中公共点粗差定位与降低粗差点影响方法研究  

ON POSITION OF GROSS ERRORS OF COMMON POINTS IN COORDINATE TRANSFORMATION AND REDUCING INFLUENCE OF GROSS ERRORS

作　　者：吴祖海[1] 罗伟钊[1] 李军[1] 

机构地区：[1]中南大学土木工程学院,长沙410004

出　　处：《大地测量与地球动力学》2014年第1期118-122,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41204024)

摘　　要：提出一种坐标转换公共点粗差定位和降低粗差点影响的新方法,即利用最小二乘平差后的方差,采用方差比值检验法,实现在布尔莎七参数计算过程中的粗差定位和剔除。并在公共点较少不适宜直接剔除的情况下,将假设检验与降权迭代计算结合,减弱粗差点的影响,提高了坐标转换的精度。算例证明了该方法的有效性。A method was presented in which variance after total least square adjustment and the variance ratio test are used to be used for position of gross errors of common points and reducing its influence in coordinate trans-formation with Burse-Wolf model. The method combined by hypothesis test with weight-reducing iteration can fit for the cases in which gross errors can not be eliminated directly. In this way, the influence of gross errors is reduced and the precision of coordinate transformation is improved. Some examples prove that this method is practical and effective.

关 键 词：坐标转换 布尔莎模型 公共点粗差 方差比值检验法 降权迭代 

分 类 号：P207[天文地球—测绘科学与技术]