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Calculation Method and Accuracy Test of Ground Free Air Anomaly Grid
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Wenchao WANG1, Hui ZHAO1, *, Jingjuan MENG1, Xiaoyan GENG1, Xiali WANG1, Huanling LIU2, 3, 4
Journal of Geodesy and Geodynamics | 2025, 45(1) : 80 - 85
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Journal of Geodesy and Geodynamics | 2025, 45(1): 80-85
Calculation Method and Accuracy Test of Ground Free Air Anomaly Grid
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Wenchao WANG1, Hui ZHAO1, *, Jingjuan MENG1, Xiaoyan GENG1, Xiali WANG1, Huanling LIU2, 3, 4
Affiliations
  • 1 Geodetic Data Processing Center, MNR, 334 East-Youyi Road, Xi'an 710054, China
  • 2 Chinese Academy of Surveying and Mapping, 28 West-Lianhuachi Road, Beijing 100036, China
  • 3 Beijing Fangshan Satellite Laser Ranging National Observation and Research Station, Longmenkou Village, Beijing 100036, China
  • 4 Key Laboratory of Surveying and Mapping Science and Geospatial Information Technology, MNR, 28 West-Lianhuachi Road, Beijing 100036, China

    • WANG Wenchao, engineer, majors in geodetic data processing, E-mail:

About Author:

WANG Wenchao, engineer, majors in geodetic data processing, E-mail:

Published: 2025-01-15 doi: 10.14075/j.jgg.2024.03.092
Outline
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We calculate local terrain and isostatic correction using spectral combination and nested different topographic resolutions and determine the free air gravity anomaly grid by the gravity reduction method. The results show that the accuracy of terrain correction calculated by the spectral combination method is the best in the test area, and the accuracy of isostatic correction calculated by nested different resolutions in the central and edge regions is best. When the integral radius is 1° and 2°, there is little difference between the local terrain correction, and the isostatic correction results differ significantly. The accuracy of free air gravity anomaly grid results obtained from the complete Bouguer and isostatic gravity anomalies by gravity reduction is the same, and the accuracy of the results is much higher than that obtained from the direct grid of free air gravity anomalies at ground points.

gravity reduction  /  local terrain correction  /  isostatic correction  /  gravity anomaly
王文超, 赵辉, 孟静娟, 耿晓燕, 王夏莉, 刘焕玲. 陆地自由空气重力异常格网计算方法及精度检验. 大地测量与地球动力学, 2025 , 45 (1) : 80 -85 . DOI: 10.14075/j.jgg.2024.03.092
Wenchao WANG, Hui ZHAO, Jingjuan MENG, Xiaoyan GENG, Xiali WANG, Huanling LIU. Calculation Method and Accuracy Test of Ground Free Air Anomaly Grid[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (1) : 80 -85 . DOI: 10.14075/j.jgg.2024.03.092
Funding
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  • Open Fund of Wuhan Gravitation and Solid Earth Tides, National Observation and Research Station(WHYWZ202213)
Appendix
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Year 2025 volume 45 Issue 1
10
3
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Article Info
doi: 10.14075/j.jgg.2024.03.092
  • Receive Date：2024-03-06
  • Online Date：2026-10-30
  • Published：2025-01-15
Article Data
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History
  • Received：2024-03-06
Funding
Open Fund of Wuhan Gravitation and Solid Earth Tides, National Observation and Research Station(WHYWZ202213)
Affiliations
    1 Geodetic Data Processing Center, MNR, 334 East-Youyi Road, Xi'an 710054, China
    2 Chinese Academy of Surveying and Mapping, 28 West-Lianhuachi Road, Beijing 100036, China
    3 Beijing Fangshan Satellite Laser Ranging National Observation and Research Station, Longmenkou Village, Beijing 100036, China
    4 Key Laboratory of Surveying and Mapping Science and Geospatial Information Technology, MNR, 28 West-Lianhuachi Road, Beijing 100036, China
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https://castjournals.cast.org.cn/joweb/ddcl/EN/10.14075/j.jgg.2024.03.092
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