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A Robust and Accurate Traveltime Calculation from

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Authors
Qin, Yilong; Ko, Seungwon; Shin, Changsoo; Zhang, Zhongjie; Seo, Youngtak; Han, Uk; Chen, Yun
Issue Date
2004-03
Publisher
한국지구시스템공학회 = The Korean society for geosystem engineering
Citation
Geosystem Engineering, 7, p. 12-20
Keywords
traveltime calculationfrequency-domain modelingparameter analysis
Abstract
We improve the accuracy and stability of
traveltime calculation method using frequency-domain
modeling algorithm. We perform a parameter analysis to
obtain the optimum combination of frequency and damping
factor and thus improve the accuracy of traveltime.
Then we obtain the empirical formula for our numerical
algorithm. Lastly, we propose the adaptive frequency and
the adaptive damping factor for an inhomogeneous model
to eliminate the distortion in the traveltime contour. Twodimensional
numerical examples verify that the proposed
algorithm gives a much smaller traveltime error and a
better traveltime contour for the complex model. Compared
to the other two methods, this algorithm computes
traveltime that is close to a directly transmitted wave. We
demonstrated our algorithm on 2D IFP Marmousi models,
and the numerical results show that our algorithm is a
faster traveltime calculation method of a directly transmitted
wave for imaging the subsurface and transmission
tomography.
ISSN
1226-9328
Language
English
URI
http://hdl.handle.net/10371/6565
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Energy Systems Engineering (에너지시스템공학부)Journal Papers (저널논문_에너지시스템공학부)
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