A SOLUTION OF GPS ELEVATION ANOMALY FITTING BASED ON
ROBUST TOTAL LEAST SQUARES
1)School of Environment Scienle and Spatial Infornatics,Suzhou University,Suzhou 234000
2)Engineering Research Center of Coal Mining Exploration of Anhui Province,Suzhou University,Suzhou 230000
Abstract:The premise of establishing GaussMarkov(GM)model based on least squares(LS)to fit GPS height anomaly is that plane coordinate of control points is errorfree,only elevation anomaly value contains observation error.A model applying robust estimation based on iteration method with variable weights was proposed in the paper.The result calculated with an example to prove the accuracy is improved with the model.