A Height Anomaly Error Algorithm of Earth Gravitational Model 2008 Based on Bursa Model
To solve the problem that the accuracy of height anomaly calculated by Earth Gravity Model 2008(EGM2008)was poor according to the longitude and latitude of the point,and it was difficult to obtain the known points nearby in the calibration area,a height anomaly error algorithm of earth gravitational model 2008 by using Bursa model was proposed.Based on the feature of Bursa model for precise height conversion,the conversion parameters obtained by the known points outside the survey area were used to calculate the height anomaly error values of EGM2008 for the survey points.The algorithm was validated through examples and comparisons with different regions,and the results show that the eleva-tion anomaly error calculated by the proposed algorithm can be used as the correction value of elevation anomaly error of EGM2008,and the height results with root-level accuracy can be obtained by using the known points at a long distance to correct the height anomaly,and it can adapt to the engineering survey requirements of different landform and terrain.
Earth Gravitational Model 2008height anomalyBursa modelerror correction
NETL
NSTL
万方数据
