INFLUENCE OF STATISTICS OF ERRORS AND INITIAL PARAMETERS ON ROBUST ESTIMATION
Li Jinlong 1) ; and Xu Junyi 1,2)
1)Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 4500522)Xi’an Information Technique Institute of Surveying and Mapping, Xi’an 710054
Abstract:In robust estimation,it is very difficult to obtain robust initial parameters, so a new method which estimate initial parameters based on initial equivalent weights of high breakdown point is proposed to more effectively reject the effcets of gross errors. It is demonstrated that initial parameters estimated with the proposed method may have more reasonable equivalent weights. When the observations are seriously contaminated by gross errors, this method remains effective.