%0 Journal Article
%T First-arrival traveltime and amplitude calculation from monochromatic two-way wave equation in frequency domain<br>利用单频双程波动方程计算初至走时及其振幅
%A Shin Changsoo
%A Seungwon Ko
%A Uk Han
%A QIN Yi-Long
%A Zhang Zhong-jie
%A Shin Changsoo
%A Seungwon Ko
%A CHEN Yun
%A CHEN Jing-Yi
%A Uk Han
%A <br>秦义龙
%A 张中杰
%A Shin Changsoo
%A Seungwon Ko
%A 陈
%A 陈竞一
%A Uk Han
%J 地球物理学报
%D 2005
%I 
%X By adding one complex frequency (real part is frequency and the imaginary part is damping factor) into the frequency-domain wave equation, the energy or amplitude after first-arrival wave can be damped. Therefore, the first-arrival traveltime and amplitude can be transformed into the pick of maximum energy and its amplitude in the monochromatic wavefield. Then, the first-arrival traveltime and amplitude can be extracted from the phase and amplitude of monochromatic frequency-domain wavefield. In order to obtain the optimum combination of the frequency and damping factor, we propose a parameter analysis scheme for all possible combinations. The numerical examples are compared with finite-difference eikonal solvers and most-energetic amplitude. The results show that our algorithm has good applicability to multi-shot and multi-receiver computation in complex media.
%K Frequency-domain wave equation
%K Complex frequency
%K First-arrival traveltime
%K Amplitude<br>频率域波动方程
%K 复数频率
%K 初至走时
%K 振幅
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=D02997228D18E5C6&yid=2DD7160C83D0ACED&vid=B6DA1AC076E37400&iid=0B39A22176CE99FB&sid=F27A401E323B6FAD&eid=B7ACE2F11789CAE0&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=8&reference_num=34