COMPARISON AMONG FAST FOURIER TRANSFORM ALGORITHMSFOR DOWNWARD CONTINUATION OF AIRBORNE GRAVITY DATA
Zhou Boyang1) ;Luo Zhicai1,2) ;Xu Chuang1) ; and Wu Yihao1)
1) School of Geodesy and Geomatics, Wuhan University, Wuhan 430079;2) Key Laboratory of Geospace Environment and Geodesy, Wuhan University, Wuhan 430079
Abstract Downward continuation is one of the major parts in the postprocessing of airborne gravity data. The formulae of inverse Possion integral, iteration method and analytical continuation by FFT are introduced briefly, then observations of gravity disturbance at flight level which are simulated with gravity potential model EGM2008 are downward continued to geoid level with these mentioned methods. A conclusion is drawn that inverse Possion integral can obtain the best results when terrain effect is neglected.
Key words ：
downward continuation
Fast Fourier Transform(FFT)
inverse Possion integral
analytic continuation
iteration method
Received: 01 January 1900
Corresponding Authors:
Zhou Boyang
Cite this article:
Zhou Boyang,Luo Zhicai,Xu Chuang et al. COMPARISON AMONG FAST FOURIER TRANSFORM ALGORITHMSFOR DOWNWARD CONTINUATION OF AIRBORNE GRAVITY DATA[J]. , 2013, 33(1): 64-68.
Zhou Boyang,Luo Zhicai,Xu Chuang et al. COMPARISON AMONG FAST FOURIER TRANSFORM ALGORITHMSFOR DOWNWARD CONTINUATION OF AIRBORNE GRAVITY DATA[J]. jgg, 2013, 33(1): 64-68.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2013/V33/I1/64
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