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XU Shi-zhe, WANG Rui, ZHOU Kian-xin, XIAO Peng-fei, CHEN Sheng-chang. To continue aeromagnetic data to the sea level[J]. Haiyang Xuebao, 2007, 29(6): 53-57.
Citation:
XU Shi-zhe, WANG Rui, ZHOU Kian-xin, XIAO Peng-fei, CHEN Sheng-chang. To continue aeromagnetic data to the sea level[J]. Haiyang Xuebao, 2007, 29(6): 53-57.
XU Shi-zhe, WANG Rui, ZHOU Kian-xin, XIAO Peng-fei, CHEN Sheng-chang. To continue aeromagnetic data to the sea level[J]. Haiyang Xuebao, 2007, 29(6): 53-57.
Citation:
XU Shi-zhe, WANG Rui, ZHOU Kian-xin, XIAO Peng-fei, CHEN Sheng-chang. To continue aeromagnetic data to the sea level[J]. Haiyang Xuebao, 2007, 29(6): 53-57.
Department of Earth Sciences, Zhejiang University, Hangzhou 310027 China
2.
Department of Navigation Guarantee, Navy Headquarters, Chinese People's Libration Army, Tianjin 300042, China
3.
China Aero Geophysical Survey and Remote Sensing Center for Land and Resource, Beijing 100083, China;School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China
The existing methods of downward continuation of potential fields connot be used to continue the aero magnetic data to the sea level because of the limited continuation depth. An iteration method for downward continuation of potential fields with a larger continuation depth has been developed, which can continue the aeromagnetic data to the sea level and get the sea-magnetic chart with the same scale as the aeromagnetic data. This downward continuation method will greatly raise the efficiency of sea-magnetic investigation. The principle of the it eration method is presented and a real case with a discussion on error of continuation is given. The effects of downward continuation of potential fields are compared using the it eration method and the fast Fourier transform(FFT) respectively, the former is much bettert han the latter.
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