航磁测量系统的外符合精度评估  

Evaluation of the external coincidence precision of the aeromagnetic survey system

作　　者：王云鹏 刘晓刚 邱雪峰[3] 宋颖 WANG Yun-Peng;LIU Xiao-Gang;QIU Xue-Feng;SONG Ying(State Key Laboratory of Geo-Information Engineering,Xi'an 710054,China;Xi'an Research Institute of Surveying and Mapping,Xi'an 710054,China;Unit 61365,Tianjin 300140,China)

机构地区：[1]地理信息工程国家重点实验室,陕西西安710054 [2]西安测绘研究所,陕西西安710054 [3]61365部队,天津300140

出　　处：《物探与化探》2023年第1期129-134,共6页Geophysical and Geochemical Exploration

基　　金：国家自然科学基金(42174001、41774018);国防科技基础加强计划技术领域基金项目(2022-JCJQJJ-0519);地理信息工程国家重点实验室开放研究基金(SKLGIE2021-ZZ-4)。

摘　　要：航磁测量系统的精度评估是磁测工作的一个重要内容。在内蒙古某测区开展了飞行实验,获得了航空和地面磁力测量数据,利用插值—迭代法和等效源法,将地面高精度磁力测量数据延拓到空中,通过与航空磁测数据进行比较,完成了航磁测量系统的外符合精度评估。两种延拓方法的精度评估结果均优于5 nT,真实反映了航磁测量系统的实际精度水平。本文研究方法不仅可以为航磁测量系统的外符合精度评估提供参考,也可以应用于新研航空磁力仪的尺度因子、偏差等参数的在线标定。The precision evaluation of an aeromagnetic survey system is an important part of a magnetic survey.This study obtained airborne and ground magnetic data through flight experiments in a certain survey area of Inner Mongolia.Then,the high-precision ground magnetic survey data was upward-continued to the height of the flight course using the interpolation-iteration and equivalent source methods.Finally,the external coincidence precision of the aeromagnetic survey system was evaluated by comparison with the aeromagnetic survey data.The precision evaluation results of the two continuation methods are better than 5 nT,reflecting the actual precision level of the aeromagnetic survey system.Therefore,the research methods in this study can provide references for the evaluation of the external coincidence precision of an aeromagnetic survey system and can also be used for online calibration of the scale factor,deviation,and other parameters of newly developed aerial magnetometers.

关 键 词：航磁测量系统 地面磁测 精度评估 插值—迭代法 等效源法 向上延拓 

分 类 号：P631[天文地球—地质矿产勘探]