| XU Shizhe,WANG Rui,ZHOU Jianxin,XIAO Pengfei,CHEN Shengchang. 2008. Downward continuation of aeromagnetic data to the marine surface. Acta Oceanologica Sinica, (1):54－60 |
| Downward continuation of aeromagnetic data to the marine surface |
| Downward continuation of aeromagnetic data to the marine surface |
| Received:February 06, 2007 Revised:October 11, 2007 |
| DOI： |
| Key words:aeromagnetic marine-magnetic downward continuation of potential field iteration method fast fourier transform |
| 中文关键词: aeromagnetic marine-magnetic downward continuation of potential field iteration method fast fourier transform |
| 基金项目:The National Natural Science Foundation of China under contract No.40644022;the China Post-doctor Science Foundation under contract No.20050335090. |
| Author Name | Affiliation | E-mail | | XU Shizhe | Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China | szxu@mail.hzzj.cn | | WANG Rui | Department of Navigation Guarantee, Navy Headquarters, Chinese People's Libration Army, Tianjing 300042, China | | | ZHOU Jianxin | China Aero-geophysical Survey and Remote Sensing Center for Land and Natural Resource, Beijing 100083, China
School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China | | | XIAO Pengfei | Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China | | | CHEN Shengchang | Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China | |
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| Abstract: |
| The existing methods of downward continuation of potential field cannot be used to continue the aeromagnetic data to the marine surface because of the limited continuation distance. An iteration method for the downward continuation of potential field with a much larger continuation distance has been developed, which can continue the aeromagnetic data to the marine surface and get the marine-magnetic chart with the same scale as the aeromagnetic data.This downward continuation method will greatly raise the efficiency of marine-magnetic investigation. The principle of the iteration method is presented. The method is demonstrated on synthetic models and real aeromagnetic data. Also, the error brought by continuation is discussed. The efficiency of the iteration method for the downward continuation of potential field is compared with the fast fourier transform (FFT) method, the former is much better than the latter. |
| 中文摘要: |
| The existing methods of downward continuation of potential field cannot be used to continue the aeromagnetic data to the marine surface because of the limited continuation distance. An iteration method for the downward continuation of potential field with a much larger continuation distance has been developed, which can continue the aeromagnetic data to the marine surface and get the marine-magnetic chart with the same scale as the aeromagnetic data.This downward continuation method will greatly raise the efficiency of marine-magnetic investigation. The principle of the iteration method is presented. The method is demonstrated on synthetic models and real aeromagnetic data. Also, the error brought by continuation is discussed. The efficiency of the iteration method for the downward continuation of potential field is compared with the fast fourier transform (FFT) method, the former is much better than the latter. |
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