EGM2008重力场模型在RTK三维水深测绘中的应用

针对区域控制点较少,无法求解高程拟合参数时,且测区无似大地水准面时,如何利用RTK进行三维水深测量的问题。本文提出利用EGM2008重力场模型,结合GPS/水准进行RTK高程传递的方法。在华北某区域对该方法的适用性进行探讨,结果表明,应用EGM2008重力场模型为辅助的RTK高程传递可以达到图根水准测量精度的要求,满足RTK水位控制精度的需求。

When the control points for the region is less,the elevation fitting parameters could not be solved,andthe quasi geoid has not gained,How to use RTK to measure3D bathymetry is a problem.In this paper,the methodof using EGM2008gravity field model and GPS/level to transfer RTK elevation is proposed.The applicability ofthis method is discussed in a region of North china,the results show that the application of EGM2008gravityfield model for RTK elevation transfer can achieve the precision of mapping control survey,meet the needs of RTKwater level control accuracy.