消除重力异常与高程相关现象的方法及应用

A method for removing the correlation between gravity anomalies and elevations and its application

重力测量结果经过外部校正之后，有时布格异常形态会随着高程变化以致形成所谓“山形异常”，使真、假异常混淆。本文就引起布格重力异常与地形起伏相关的原因进行了分析探讨，针对由于重力外部校正不准确出现的这种相关现象，提出了用滑动窗口调整中间层密度的方法和以相对海拔高差作校正的方法，来避免这种虚假异常的产生。实际资料的处理证明效果十分明显。

After the external correction, the Bouguer gravity anomaly shape may sornetimes change with the elevation, confusing the true anomaly with the false anomaly. In the paper, we analyze the reason of the correlation between Bouguer gravity anomalies and topographic relief. In view of the correlation appearance due to the inaccurate external correction, we propose to adjust the interface layer density with sliding window and to make correction with relative elevation in order to avoid the false anomaly. Real data processing demonstrates the effectiveness of the method.