物探与化探2025，Vol.49Issue(6)：1311-1318,8.DOI:10.11720/wtyht.2025.1336
CM4模型在南海南部某工区磁测数据重处理中的应用
Application of the CM4 model in reprocessing magnetic survey data of a study area in the southern South China Sea
摘要
Abstract
During the reorganization of historical magnetic survey data for the South China Sea,it was found that the processed magnet-ic urvey data of a specific area in the southern South China Sea exhibited low accuracy,affecting the effectiveness of data use.Data a-nalysis reveals that the low accuracy was primarily caused by the significant errors in diurnal correction.Therefore,it is necessary to modify the diurnal correction method and reprocess the data.Based on the recollected data from various available geomagnetic observa-tion stations and the variations of the geomagnetic field,this study simulated the magnetic diurnal variations in the study area during the survey period using three algorithms:the CM4 model,regression analysis,and regression analysis based on the data sample control of the CM4 model.The historical magnetic survey data were recorrected for diurnal variations,with data affected by magnetic disturbances removed based on geomagnetic indices,significantly enhancing data accuracy.This study addresses the problem of low accuracy in his-torical magnetic survey data in the study area,providing a novel approach for the fine-scale reprocessing of magnetic survey data related to the South China Sea.关键词
海洋磁测/南海南部/数据重处理/日变改正/CM4模型/回归分析Key words
marine magnetic survey/southern South China Sea/data reprocessing/diurnal correction/CM4 model/regression analysis分类
天文与地球科学引用本文复制引用
张向宇,张瑶,邢琮琮..CM4模型在南海南部某工区磁测数据重处理中的应用[J].物探与化探,2025,49(6):1311-1318,8.基金项目
中国地质调查局项目(DD20221912) （DD20221912）
