摘要
为了评价航磁成图数据精度,通常在完成精细调平等处理后依据航空磁测总精度评价方法进行评价.但经过精细调平或反复调平可以使成图数据精度达到很高,不能反应实际情况.针对这一问题,本文提出了一种基于位场曲面延拓的航磁成图数据精度评价方法,该方法是将航磁数据经各项改正后、精细调平前的测线数据通过非规则网延拓算法延拓至切割线测点(或交叉点)处,再计算二者的均方根偏差来进行精度评价.该精度评价方法不需要经过精细调平也可避免多次调平,不需要舍弃交叉点,并且克服了交叉点处点位坐标不一致的问题,可以客观地评价航磁成图数据的精度,也作为评价航磁数据精度的一种新方法,同时也可用该曲面延拓方法进行曲面数据处理成图.通过模型测试和实际资料处理,验证了该方法的正确性和实用性.
In order to evaluate the accuracy of aeromagnetic mapping data, we usually evaluate the total accuracy of the aeromagnetic measurements based on the evaluation method after completing the fine leveling process. However, fine leveling or repeated leveling can make the mapping data highly accurate, thus not reflecting the actual situation. For this problem, this paper proposes an aeromagnetic mapping accuracy evaluation method based on the potential field surface continuation. The method is to extend the measuring line aeromagnetic data to the cutting line survey points(or intersection points) by a non-regular network extension algorithm after each correction and before fine leveling, and then calculate the root-mean-square deviation of the two for accuracy evaluation. This method does not require fine leveling and can avoid multiple leveling, does not need to discard any measuring points and overcomes the problem of inconsistent position coordinates of the measuring points. Therefore, the accuracy of aeromagnetic mapping data can be evaluated more objectively. This method is also used as a new method to evaluate the accuracy of aeromagnetic data. Through model testing and actual data processing, the correctness and practicability of the method are verified.
作者
张义蜜
熊盛青
于长春
王万银
ZHANG YiMi;XIONG ShengQing;YU ChangChun;WANG WanYin(Institute of Gravity and Magnetic Technology,School of Geology Engineering and Geomatics,Chang'an University,Key Laboratory of Western Mineral Resources and Geological Engineering,Ministry of Education,Chang'an University,Xi'an 710054,China;National Engineering Research Center of Offshore Oil and Gas Exploration,Beijing 100028,China;China Aero Geophysical Survey and Remote Sensing Center for Natural Resources,Key Laboratory of Airborne Geophysics and Remote Sensing Geology,Ministry of Natural Resources,Beijing 100083,China;Department of Earth Sciences,Memorial University of Newfoundland,St.John's,Newfoundland AlB3X5,Canada)
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2023年第3期1257-1268,共12页
Chinese Journal of Geophysics
基金
国家重点研发计划课题(2017YFC0602202,2017YFC0602201)
中央高校基本科研业务费专项资金—长安大学优秀博士学位论文培育资助项目(300102261717)联合资助。
关键词
航磁测量
精度评价
航磁成图数据精度
曲面延拓
Airborne magnetic measurement
Accuracy evaluation
The accuracy of aeromagnetic mapping data
Curved surface continuation
