%0 Journal Article
%T METHOD OF CREATING SHORT OPERATOR OF WAVEFIELD EXTRAPOLATIN G<br>波场延拓短算子构造方法
%A LI BING
%A <br>李冰
%J 地球物理学报
%D 2003
%I 
%X In explicit depth extrapolation method of frequency-space fields, wavefield depth extrapolation is completed with convolution of short explicit difference operators and the wavefield. Based on the study of the method of creating short explicit difference operators, a method for creating short explicit operators is presented, which is based on discrete smooth interpolation with control of phase-shift operator. In the wavefield-spread area, we uses the phase-shift operator as constraint in frequency-wavenumber field, while beyond the wavefield-spread data, we uses zero point at the ends of phase-shift operator as constraint to take discrete smooth interpolation so that the resulted operator satisfies two-order smooth and the length of this operator can be selected shorter in frequency-space field. This method has simple creating process and high precision, and can be used in wavefields depth extrapolation.
%K Short explicit difference operators
%K Phase-shift operator
%K Discrete smooth interpolation<br>显式差分短算子
%K 相移算子
%K 离散光滑插值
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=BF8EC0A65385FF2E&yid=D43C4A19B2EE3C0A&vid=D997634CFE9B6321&iid=0B39A22176CE99FB&sid=28F9D9CF04F424FF&eid=4B1FFFA116F7AE3B&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=14&reference_num=7