基于OBF反变换的航空磁探测数据中方波干扰的剔除方法

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关键词：航空磁异常探测；磁干扰；斜距估计；信号反演；相似度计算中图分类号：TN911.72；O411.5 文献标志码：A DOI：10.12305/j.issn.1001-506X. 2025.07.04

Abstract： The square wave interference in the aeromagnetic anomaly detection data is very likely to be misjudged as the magnetic target signal by the magnetic anomaly signal detection system.A false alarm reduction method is proposed for the square wave interference in the aeromagnetic survey data.Based on the orthogonal basis function （OBF）detection to initially alert suspected magnetic anomaly signals，the algorithm estimates the slant range and uses OBF inverse transformation to obtain inversion signals adapted to the detection scene，effectively eliminating square wave interference using waveform similarity comparison methods. Finally，verification experiments are conducted using simulated and real data. The results indicate that compared to traditional OBF detection，the proposed waveform similarity comparison method for filtered signal and inversion signal can efectively eliminate square wave interference，and meet the application requirements of low false alarm rate in the magnetic detection system.

Keywords ： airborne magnetic anomaly detection （MAD）；magnetic interference;slant range estimation; signal inversion;similarity calculation

0 引言

是一种重要的非声学探测方式，其利用机载磁探仪对水下磁性目标所暴露的磁场进行航测，通过数据处理监测背景磁场的变化和对磁异常的判断，对其实现探测、定位和确航空磁异常探测（magneticanomalydetection，MAD）的协配衣奋。（剩余14854字）