Application of EGM2008 Gravity Field in RTK Height Survey

Because of the WGS-84 elevation obtained by the GPS measurements and the normal height system adopted in China,elevation fitting must been done which using the RTK elevation,and sensing area and quantity sufficient GPS/level points is uniformly distributed.As in China,the overall accuracy of EGM2008 gravity field models of height anomaly is 20 cm,and the application of the EGM2008 model in RTK height measurement method is presented,and that according to the actual application of check results,RTK single point correction can reach high accuracy.