Abstract：In this paper we use the EGM2008 gravity field model to calculate the height anomaly, combining this with SRTM and DTM2006.0,to futher calculate the remaining terrain model. We then calculate the RTM height anomaly, in order to compensate for the lack EGM2008 gravity field model shortwave signals. We subtract the RTM height anomaly form the measured height anomaly in the gravity field model to get the residual abormal anomaly height. The surface fitting method using residual height anomaly model allows us to solve problems of elevation benchmark system deviation. The calculations are proven by actual GPS/leveling data and comparison of the results without RTM.The method can significantly improve the abnormal elevation accuracy of GPS points,
refining for regional geoid purposes
ZHAI Changzhi,YAO Yibin,YUE Shun. Geoid Refinement Method Based on the Regional EGM2008
and the Remaining Terrain Model[J]. jgg, 2015, 35(6): 941-944.
