一种改进的低纬度磁场化极方法——变频双向阻尼因子法

摘要

本文在考察分析原有的低纬度化极阻尼因子的基础上,提出了对原有阻尼因子的改造方法,即提出变频双向阻尼因子,改造后的阻尼因子不仅考虑了对振幅的压制,并兼顾了对相位谱的改造,同时还增加了频率控制因子.通过模型数据和实际资料检验,表明在低纬度地区,特别是在极低纬度地区,变频双向阻尼方法的化极结果能更有效地突出地质信息.%This paper reviewed and analysed the commonly used damping factors, and then brought forward a method for rebuilding the damping factor, that is, the frequency conversion bidirectional damping factor (FCBDF). This factor not only presses amplitude spectrum, and rebuilds phase spectrum, but also supplements a frequency conversion factor. By tests on model data and actual data, it is proved that this method could get better result and highlight geological information.