jgg     2013 33 (1):  64-68    ISSN: 0412-1961  CN: 21-1139/TG COMPARISON AMONG FAST FOURIER TRANSFORM ALGORITHMSFOR DOWNWARD CONTINUATION OF AIRBORNE GRAVITY DATA Zhou Boyang1) ;Luo Zhicai1,2) ;Xu Chuang1) ; and Wu Yihao1) 1) School of Geodesy and Geomatics, Wuhan University, Wuhan 430079;2) Key Laboratory of Geospace Environment and Geodesy, Wuhan University, Wuhan 430079 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null