STUDY ON GPS ELEVATION FITTING CONSIDERED THE INFLUENCE
OF COVARIANCE FUNCTION
1)〖ZK（〗Guangxi Scientific Experiment Center of Mining，Metallurgy and Environment，
Guilin University of Technology,Guilin 541004
2)College of Geomatics Engineering and Geoinformations，GUT，Guilin 541004
3)Guangxi Key Laboratory of Spatial Information and Geomatics，Guilin 541004
4）School of Geodesy and Geomatics，Wuhan University，Wuhan 430079
Abstract：For improving precision，a removingrecovering method is used to remove the long wave information of earth gravity field model to get more smooth residual gravity height anomaly，and compared the influence of different covariance function on the fitting results of least square collocation which take measurement error and model error into account.The results show that Gaussian recovering and resemble Gaussian function can achieve higher fitting precision for a large area with height anomaly value changes significance；the removerestore method can effectively improve the fitting precision to least square collocation method which depend on the covariance value of each points.
Zhang Tengxu,Liu Lilong,Zhou Miao et al. STUDY ON GPS ELEVATION FITTING CONSIDERED THE INFLUENCE
OF COVARIANCE FUNCTION[J]. jgg, 2014, 34(5): 178-182.
