Guilherme,
The correlate function in sac does the computation in the frequency domain; it is a standard methodology. See
https://en.wikipedia.org/wiki/Cross-correlation
The only complication is the use of multiple time windows with possible overlap to perform the computation.
References:
If you require a reference for citing, use the references from the README; see below. I would prefer to update these references as they are rather dated.
If you require description of the correlation details, I would suggest looking at the source code in
- src/dbh/crscor.c (Actual correlation function)
- src/sam/xcorrelate.c (SAC function driver / option processing)
Of course, you can ask me questions about any particular details of the processing.
Cheers,
Brian
References:
Goldstein, P., A. Snoke, (2005), "Sac Availability for the IRIS Community",
Incorporated Institutions For Seismology Data Management Center Electronic
Newsletter,
http://ds.iris.edu/ds/newsletter/vol7/no1/sac-availability-for-the-iris-community/
Goldstein, P., D. Dodge, M. Firpo, Lee Minner (2003), "SAC2000: Signal
processing and analysis tools for seismologists and engineers", Invited
contribution to "The IASPEI International Handbook of Earthquake and
Engineering Seismology", Edited by WHK Lee, H. Kanamori, P.C. Jennings, and
C. Kisslinger, Academic Press, London.
On Oct 22, 2017, at 9:21 PM, GUILHERME De MELO <gwsmelo<at>ufrn.edu.br> wrote:
Hello!
Does anyone know the bibliographic reference of the cross correlation method used by the SAC in the correlate command?
Regards,
Guilherme de Melo
--
Guilherme Weber Sampaio de Melo
Master's seismology research - UFRN/BR
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Guilherme de Melo
George Sand França
Brian Savage
