Diurnal variation correction method for multiple geomagnetic stations based on geomagnetic coordinates
GAO Shan1(), WANG Wen-Bo2(), CUI Zhi-Wei3,4, ZHANG Qi-Jie1, YAN Hong-Yu1, GAO Wei1
1. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China 2.61365 Troops,Tianjin 300100, China 3. School of Earth and Space Sciences, Peking University,Beijing 100091,China 4.32011 Troops,Beijing 100094,China
The conventional diurnal variation correction of multiple geomagnetic stations based on geographic coordinates is to increase the precision of diurnal variation correction by improving the calculation methods. Based on the comparative analysis of conventional diurnal variation correction methods, this study proposed the geomagnetic coordinate fitting method for diurnal variation correction based on the high correlation between geomagnetic coordinates and geomagnetic field strength. The experimental results show that the diurnal variation correction of multiple geomagnetic stations based on geomagnetic coordinates generally improves the precision of diurnal variation correction and, thus, serves as a new study approach for diurnal variation correction of multiple geomagnetic stations.
Zhang X Y, Guang Y X, Zhang X L, et al. The application of regression to estimating geomagnetic data[J]. Geophysical and Geochemical Exploration, 2016, 40(3):603-608.
[3]
管志宁. 地磁场与磁力勘探[M]. 北京: 地质出版社, 2005.
[3]
Guan Z N. Geomagnetic field and magnetic exploration[M]. Bejing: Geology Press, 2005.
Pan X C, Yao C L, Zheng Y M, et al. Study on latitude correction method of diurnal variation correction for marine magnetic survey[J]. Chinese Journal of Geophysics, 2020, 63(8):3025-3036.
Shan R J, Jin G, Zeng Z C. Study on geomagnetic diurnal variation and its fitting methods in local area.[J]. Journal of Changchun University of Earth Science, 1990(3):1315-323.
Bian G, Liu Y C, Bian G L, et al. Research on computation method of multi-station diurnal variation correction in marine magnetic surveys[J]. Chinese Journal of Geophysics, 2009, 52(10):2613-2618.
Bian G L, Zhai G J, Liu Y C, et al. Effective operating range of base stations in marine geomagnetic survey[J]. Progress in Geophys, 2010, 25(3):817-822.
Bian G L, Liu Y C, Zhai G J, et al. Diurnal geomagnetic correction with multi-observatories in marine magnetic surveying[J]. Science of Surveying and Mapping, 2010, 35(3):118-120.
Gu C L, Zhang Y, Xu R G, et al. The method of geomagnetic diurnal correction to vector geomagnetic data by virtual variation station[J]. Chinese Journal of Geophysics, 2013, 56(3):834-841.
[10]
Charles E B, Chris Z T. Geomagnetic, geocentric, and geodetic coordinate transformations[J]. Computers and Geosciences, 1991, 17(5):669-678.
doi: 10.1016/0098-3004(91)90038-F
