海洋磁测中单台站地磁数据补缺方法探讨  

Discussion on the Method of Geomagnetic Data Supplement for Single Station in Marine Survey

作　　者：张向宇[1,2] 关永贤 王功祥[1] ZHANG Xiang-yu;GUAN Yong-xian;WANG Gong-xiang(Key Laboratory of Marine Mineral Resources of Ministry of Land and Resources,Guangzhou Marine Geological Survey,Guangzhou 510075,China;Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China)

机构地区：[1]国土资源部海底矿产资源重点实验室广州海洋地质调查局,广东广州510075 [2]南方海洋科学与工程广东省实验室(广州),广东广州511458

出　　处：《海洋技术学报》2020年第6期17-24,共8页Journal of Ocean Technology

基　　金：南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0207);中国地质调查局项目(DD20191002,DD20191007,DD20190216,DD20191037)。

摘　　要：随着海洋测量工作的不断深入,对海洋磁测成果数据的需求量日渐增大,而受制于实际采集情况,时常会出现地磁台站某一时间段内缺失数据的情况,导致无法进行数据处理,为了解决该问题,本文提出联合谐波分析法和聚类分析法的单台站地磁数据补缺方法。首先采用谐波分析法逐日重构静日变化数据,并引入聚类分析法对分离出的静日变化数据进行遴选,选取合适的数据求取缺失数据时间内的静日变数据,再附加上由参考地磁台站分离出的磁扰数据,合成缺失时间内的地磁数据,最终完成对地磁台站的数据补缺工作。实例计算分析验证表明,该方法计算结果与实测数据偏差合理,具有一定的可靠性,有效地解决了地磁数据缺失的问题。With the deepening of marine survey,the demand for marine magnetic survey data is increasing,due to the actual acquisition situation,the geomagnetic stations often lack data at a certain time which leads to the failure of data processing.In order to solve this problem,a method used the harmonic analysis method and cluster analysis method jointly is proposed.Firstly,the harmonic analysis method is used to calculate the magnetostatic diurnal variation data day by day,then we can acquire the magnetostatic diurnal variation data in the missing time by using cluster analysis method,in addition,the magnetic disturbance data separated from the reference geomagnetic station is added to the magnetostatic diurnal variation data within the time of missing data,finally the data supplemented work is finished.Through the calculation and analysis of an example,the deviation between the calculated results and the measured data is reasonable,so the method is reliable.

关 键 词：海洋磁测 谐波分析 聚类分析 日变改正 

分 类 号：P631.4[天文地球—地质矿产勘探]