综合利用位场及其梯度直接进行曲化平处理

Integrate use of potential field and its gradient for the continuation from a curved surface to a horizontal plane

航空磁测中飞机的飞行高度通常不是一个平面,曲化平处理可以消除观测面起伏的影响.在进行多参量(例如测量的磁场及其三轴向梯度)测量时,可以研究综合利用测量磁场的多参量的曲化平处理方法.本文通过模型计算,利用梯度转换的法向导数通过边界元方法进行曲化平处理,达到了很好的效果,充分利用磁场梯度反映磁场在各个方向上变化率的作用.对综合利用磁场及其梯度进行曲化平处理给出了一个思路.该方法原理清晰,程序实现简单.

The aircraft could not always fly at the same altitude when airborne magnetic survey was carried out. Data continuation from a curved surface to a horizontal plane was very necessary.While multiple parameters（ such as magnetic field and its gradient in the three directions） was measured,we could study integrate use of the multi-parameters of magnetic field for this continuation.Through model test,this paper performed the continuation by boundary element method using normal derivative converting from gradient,the result was very well,making full use of the variation characteristics of the magnetic field reflected by the magnetic gradient in all directions. The processing gave a good ideal on the integrate use of potential field and its gradient for the continuation from a curved surface to a horizontal plane. The principle of this method was clear,simple and practical.