Journal
GEOPHYSICAL JOURNAL INTERNATIONAL
Volume 165, Issue 2, Pages 432-435Publisher
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-246X.2006.02925.x
Keywords
finite difference methods; numerical techniques; ray tracing; seismic velocities; tomography
Categories
Ask authors/readers for more resources
We have found that the extensively used finite difference scheme time3d produces time fields which are 'asymmetric' in the sense that traveltimes computed to the right of the source are faster than traveltimes computed to the left. All finite difference schemes will, as they are approximations to the wave equation, to some extent fail to obey reciprocity perfectly. We show, however, that the errors in time3d may be significant-and unnecessarily large. An asymmetry in the point source initialization has been identified, and after correction time3d produces time fields with an improved reciprocity.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available