摘要
测线的布设是海洋磁力测量技术设计中的关键内容,合理的测线间距对所构建地磁基准图的精度和测量效率起着至关重要的作用.针对目前海洋磁力测线间距仅依靠比例尺而定,没有考虑地磁异常特征和实际需求中所构建磁异常图空间分辨率及精度与测线间距的关系,本文提出了一种融合特征复杂度指标确定测线间距的方法,通过构建磁背景场特征分布与成果数据精度与空间分辨率的转换模型来确定测线间距,结合实测航空、船载磁测数据进行验证,结果表明:通过本文估算测线间距进行构图,在满足实际应用场景对地磁基准图精度和分辨率要求的前提下,在本文选取的船载和航空磁测算例中可节省88.4%船磁工作量,97.6%航磁工作量.
The deployment of survey lines is a key element in the design of marine magnetic survey technology,and the reasonable spacing of survey lines plays a crucial role in the accuracy and measurement efficiency of the constructed geomagnetic reference map.In view of the fact that the spacing of marine magnetic survey lines only depends on the scale,without considering the geomagnetic anomaly characteristics and the relationship between the spatial resolution and accuracy of the magnetic anomaly map and the spacing of survey lines,this paper proposes a method of determining the spacing of survey lines by integrating the feature complexity index,and determining the spacing of survey lines by constructing a conversion model of the feature distribution of the magnetic background field and the accuracy of the resultant data with the spatial resolution.The results show that the estimation of the spacing of survey lines for mapping in this paper can save 88.4%of the workload of shipborne magnetic survey and 97.6%of the workload of aeromagnetic survey in the shipborne and aeromagnetic survey cases selected in this paper,under the premise of meeting the requirements of the actual application scenarios for the accuracy and resolution of geomagnetic reference maps.
作者
熊攀
刘强
边刚
金绍华
王文钊
徐佳丹
段盛文
XIONG Pan;LIU Qiang;BIAN Gang;JIN ShaoHua;WANG WenZhao;XU JiaDan;DUAN ShengWen(Department of Military Oceanography and Hydrographic&Cartography,Dalian Naval Academy,Dalian Liaoning 116018,China;School of Geodesy and Geomatcis,Wuhan University,Wuhan 430079,China)
出处
《地球物理学报》
北大核心
2025年第12期4605-4616,共12页
Chinese Journal of Geophysics
关键词
海洋磁力测量
测线间距
融合特征复杂度
地磁基准图
地磁匹配导航
Marine magnetometry
Line spacing
Fusion feature complexity
Geomagnetic reference map
Geomagnetic matching navigation
