海洋地磁场的垂直空间变化分析

Analysis of vertical space variation of marine magnetic field

将海洋磁力测量数据归算到统一的基准面上可以提高测量和成图的精度.由于归算方法本身存在误差,并不是所有的测量数据都必须归算到统一的基准面上.本文首先理论分析地磁异常的垂直空间变化,然后采用曲面向上延拓技术,利用两个典型海洋磁场数据分析海洋地磁异常的垂直空间变化,研究了海洋地磁异常随高度变化的规律.最后得出海洋磁力测量数据进行归算的阈值条件.

Not all marine magnetic survey data can be reduced to a unified plane.In this paper,the vertical spatial variation of anomaly is analyzed by theory.Furthermore,the curved surface upward continuation method is adopted to analyse the vertical space variation of marine magnetic anomaly with two sets of real marine magnetic survey data.The law of vertical spatial variation with height is analyzed.At last,the reduction condition is brought out in this paper.