An improved mixed total least squares method for strain inversion from distance changes  

作　　者：Zhiping Liu Sida Li Hefang Bian 

机构地区：[1]NASG Key Laboratory of Land Environment and Disaster Monitoring, School of Environmental Science and Spatial Informatics, China University of Mining Technology

出　　处：《Geodesy and Geodynamics》2016年第5期356-360,共5页大地测量与地球动力学（英文版）

基　　金：supported by both the National Natural Science Foundation of China (41204011);the fundamental research funds for the Central Universities (2014QNB17)

摘　　要：Based on the deficiency of the traditional total least squares method（TLS） in the field of geodetic inversion, the mixed error characteristics of the errors in variables（EIV） model were analyzed by considering the distance azimuth measurement error in strain inversion from distance changes, which resulted in the improved mixed total least squares method（IMTLS） with generalized mixed EIV model. Finally, three comparison schemes of strain inversion from distance changes using measured data were implemented to test the proposed method. The results showed that the IMTLS method outperformed the traditional least squares（LS） and TLS methods in parameters estimation, accuracy evaluation, actual EIV model characteristics, and five strain eigenvalues.Based on the deficiency of the traditional total least squares method（TLS） in the field of geodetic inversion, the mixed error characteristics of the errors in variables（EIV） model were analyzed by considering the distance azimuth measurement error in strain inversion from distance changes, which resulted in the improved mixed total least squares method（IMTLS） with generalized mixed EIV model. Finally, three comparison schemes of strain inversion from distance changes using measured data were implemented to test the proposed method. The results showed that the IMTLS method outperformed the traditional least squares（LS） and TLS methods in parameters estimation, accuracy evaluation, actual EIV model characteristics, and five strain eigenvalues.

关 键 词：Distance changes Strain inversion TLS Mixed EIV model IMTLS 

分 类 号：P22[天文地球—大地测量学与测量工程]