EGM2008重力场模型在RTK高程测量中的应用

摘要

由于GPS测量得到的是WGS-84高程,而我国采用正常高系统,使用RTK高程必须进行高程拟合,需要均匀分布测区且数量足够的GPS/水准已知点。在我国大陆,EGM2008重力场模型高程异常总体精度为20cm,提出了将EGM2008模型应用于RTK高程测量的方法,根据实际应用检核结果,RTK单点校正即可达到较高精度。%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.