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Application of Magnetic Continuation in Geomagnetic Background Field Matching
Author(s): 
Pages: 36-38
Year: Issue:  3
Journal: Hydrographic Surveying and Charting

Keyword:  magnetic surveyingmagnetic background fieldsignal recognitionmagnetic continuationgeomagnetic matching;
Abstract: 在浅海地区,由于复杂的地磁背景场会对航空磁异常探测(MAD)造成影响,导致目标识别的虚警率过高.为了降低虚警率,需要将地磁背景场从飞机探测的磁场中剥离出来.文中使用的地磁背景场通过船磁测量获得.但是MAD和船磁测量不在同一个高度/平面内,需要通过磁法向上延拓的方法,将船测磁场向上延拓到飞机飞行高度.基于海上磁测数据,通过磁法向上延拓的方法,获得飞机飞行平面内的地磁背景场,然后将实际飞行的磁测数据减去地磁背景场来完成地磁匹配,最终达到降低MAD信号识别输出虚警的目的.
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