航磁测量系统的外符合精度评估

doi:10.11720/wtyht.2023.2682

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Abstract

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.

Key words： aeromagnetic survey system ground magnetic survey precision evaluation interpolation-iteration method equivalent source method upward continuation

Received: 20 December 2021 Published: 24 February 2023

ZTFLH:

P631

Corresponding Authors: LIU Xiao-Gang E-mail: wangyp1813@163.com;liuxiaogang_1949@163.com

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	Yun-Peng WANG
	Xiao-Gang LIU
	Xue-Feng QIU
	Ying SONG

Cite this article:

Yun-Peng WANG,Xiao-Gang LIU,Xue-Feng QIU, et al. Evaluation of the external coincidence precision of the aeromagnetic survey system[J]. Geophysical and Geochemical Exploration, 2023, 47(1): 129-134.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.2682 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I1/129

Diagram of upward continuation by interpolation-iteration method

Flow diagram of aeromagnetic survey data processing

Flight quality evaluation of cross-line

Comparison before and after diurnal variation correction

Comparison before and after aeromagnetic compensation

Ground elevation (a) and magnetic anomaly (b)

Original observation profile of EW20 and upward continuation results

Original observation profile of EW30 and upward continuation results

The evaluation results of interpolation-iteration method (a) and eauivalent source method (b) of external coincidence precision evaluation

The results external coincidence precision evaluation

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