利用航空重力测量和DEM确定地面重力场

DETERMINATION OF THE TERRAIN SURFACE GRAVITY FIELD USING AIRBORNE GRAVIMETRY AND DEM

本文基于空中一点重力异常可以代表地面一定相关区的平均重力异常的频谱特性，以及在局部区域空间异常与地形高的相关性，提出综合利用航空重力测量和数字高程模型（ＤＥＭ）确定地面重力异常的方法。该法可以解决航空重力测量分辨率受航高所限以及地面相关区重叠等问题。

This paper presents a method for determining the terrain surface gravity anomalies using airborne gravimetry and the digital elevation model(DEM). This method is based on that one point aero gravity anomaly can represent the mean gravity anomaly in the terrain surface relative area, and the surface gravity anomalies are related to the terrain elevations. The problems such as the aerborne gravimetry resolution and the relative area overlap can all be solved by means of this method. A great number of numerical tests prove that this method is reliable.