Bifactor Weight Determination Method Considering the Influence of Latitude and Longitude in the Calculation of Diurnal Variation of Geomagnetic Data

LIU Xiaogang; XU Jinglin; ZHANG Suqin; GUAN Bin

doi:10.13203/j.whugis20180454

Volume 45 Issue 10

Oct. 2020

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Geomatics and Information Science of Wuhan University > 2020 > 45(10): 1547-1554. > DOI: 10.13203/j.whugis20180454

LIU Xiaogang, XU Jinglin, ZHANG Suqin, GUAN Bin. Bifactor Weight Determination Method Considering the Influence of Latitude and Longitude in the Calculation of Diurnal Variation of Geomagnetic Data[J]. Geomatics and Information Science of Wuhan University, 2020, 45(10): 1547-1554. DOI: 10.13203/j.whugis20180454

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Bifactor Weight Determination Method Considering the Influence of Latitude and Longitude in the Calculation of Diurnal Variation of Geomagnetic Data

LIU Xiaogang^{1, 2,},
XU Jinglin^{1, 3},
ZHANG Suqin⁴,
GUAN Bin^{1, 2}

1.
State Key Laboratory of Geo-Information Engineering, Xi'an 710054, China
2.
Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China
3.
Northwestern Polytechnical University, Xi'an 710072, China
4.
Institute of Geophysics, China Earthquake Administration, Beijing 100081, China

Funds:

The National Key Research and Development Program of China 2018YFC1503806

the National Natural Science Foundation of China 41774018

Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University CX201814

Open Foundation of State Key Laboratory of Geo-information Engineering SKLGIE2017-Z-3-2

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Author Bio:
LIU Xiaogang, PhD, associate researcher, specializes in the gravimetry and geomagnetic data processing. E-mail: liuxiaogang_1949@163.com
Received Date: December 26, 2019
Published Date: October 04, 2020

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Abstract

Abstract

The deficiencies of reverse distance weighting method and reverse latitude difference weighting method traditionally used in the calculation of diurnal variation of geomagnetic data are analyzed. According to the characteristics that the geomagnetic field has affinity with the changing of latitude, and considering the influence of latitude and longitude in the calculation of diurnal variation of geomagnetic data, the bifactor weight determination method is proposed. The validity of the proposed method is testified using geomagnetic observatory data supplied by Intermagnet website. Compared with the reverse distance weighting method and reverse latitude difference weighting method, the new bifactor weight determination method has more superiority.Experimental result shows that the proposed method is applicable in the calculation of diurnal variation of geomagnetic data, and it may have wide application prospect in diurnal variation correction of satellite, airborne and seaborne geomagnetic measurement data.
- airborne geomagnetic measurement,
- geomagnetic observatory,
- diurnal variation correction,
- bifactor weight,
- Intermagnet

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