Convolution으로 정규화된 파동장을 이용한 송신원에 무관한 탄성파 완전파형 역산

Title
Convolution으로 정규화된 파동장을 이용한 송신원에 무관한 탄성파 완전파형 역산
Alternative Title
Efficient calculation of steepest descent direction for source-independent waveform inversion using normalized wavefield by convolution
Author(s)
정순홍; 신창수; 편석준; 민동주; 서상용
Publication Year
2004-10-14
Abstract
In conventional waveform inversion, geophysicists usually invert a velocity model as well as a source signature simultaneously. For a source-independent waveform inversion, we define a new objective function by multiplying both observed data and forward modeled data by the respective reference wavefields on the cross. For computation of the steepest descent of the new objective function, we exploit a matrix formalism originated from the symmetry of Green's function of wave equation. In this case, we calculate the steepest descent without explicitly computing the Jacobian matrix. Numerical structure of our algorithm resembles that of prestack reverse-time migration and waveform inversion.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/31733
Bibliographic Citation
SEG internationa Exposition and 74th Annual Meeting, pp.1 - 4, 2004
Publisher
The Society of Exploration Geophysicists
Type
Conference
Language
English
Publisher
The Society of Exploration Geophysicists
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