APPLICATION OF WEIGHTED TOTAL LEAST SQUARES IN ITRF TRANSFORMATION
Lu Jue 1) ; Chen Yi 1,2) ; and Zheng Bo 3)
1)The Department of Surveying and Geo-informatics, Tongji University, Shanghai 200092;
2)Key Laboratory of Advanced Surveying Engineering of SBSM, Shanghai 200092;3)Shanghai Cadastre Maragenent Center, Shanghai 200003
Abstract：According to the fact that the points in two transformational coordinate systems are all affected by random errors, which make the observation vector and coefficient matrix in error equations both include errors, and even, these observations and elements in coefficient matrix may be heteroscedastic and correlated.We employ the weighted total least squares solution to calculate the parameters of ITRF transformation. To demonstrate the performance and efficiency of the application of WTLS solution in coordinate transformation, the simulation and real experiments are implemented. The results show that the WTLS solution is correct and more reasonable.
