Thread: Correlate

Guilherme,
Have you tried using the correlate command? Did it produce results that made sense?

The range of data that Sac can work with means that you sometimes have to do some tests with your own data to get good results.

The Sac manual is usually a good resource to start with.

Unless you can find someone who has time to get familiar with your data, you are likely to be your own best source of help.

Leigh

On Sep 19, 2017, at 12:16 PM, GUILHERME De MELO <gwsmelo<at>ufrn.edu.br> wrote:

Hello!

I have a set of nine p-wave data and I would like to know if there is correlation between it.

Someone would know tell me how I should make using "correlate" command in the SAC?

Regards,
Guilherme de Melo


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Hi Guilherme,
Here's a little macro I have to get you going. You have to modify variables
in the USER INPUT section.

Januka


UNSETBB ALL
*----------USER INPUT------------
*MF=MASTER FILE; PP=PAUSE PERIOD IN SEC; WC=WILD CARD
SETBB MF ABC.SAC
SETBB PP 5
SETBB WC *.SAC
*--------------------------------
DC ALL
DO FILE WILD %WC
MESSAGE "Correlating %MF% with $FILE"
COLOR ON INC ON LIST RED BLUE GREEN
READ %MF $FILE
BEGINFRAME
XVPORT 0.05 1.00
YVPORT 0.06 0.44
TITLE 'ORIGINAL FILES: MASTER (TOP) DATA (BOTTOM)'
PLOT1
CORRELATE MASTER %MF NORMALIZED
XVPORT 0.05 1.00
YVPORT 0.50 0.95
TITLE 'AUTO (TOP) and CROSS (BOTTOM) CORRELATION'
PLOT1
ENDFRAME
XVPORT 0.05 1.00
YVPORT 0.05 0.95
PAUSE PERIOD %PP
ENDDO

Januka Attanayake
Postdoctoral Research Associate

Institute for Geophysics
WWU Münster | CorrensstraBe 24 | 48149 Münster | Germany
Tel +49 251 833 4727

University email: jattanayake<at>uni-muenster.de
Homepage: http://sites.google.com/site/janukaattanayake/

On 19 September 2017 at 20:16, GUILHERME De MELO <gwsmelo<at>ufrn.edu.br>
wrote:

Hello!

I have a set of nine p-wave data and I would like to know if there is
correlation between it.

Someone would know tell me how I should make using "correlate" command in
the SAC?

Regards,
Guilherme de Melo


----------------------
SAC Help | http://ds.iris.edu/message-center/topic/sac-help/ |
Unsubscribe: sac-help-unsubscribe<at>lists.ds.iris.edu

Sent from the IRIS Message Center (http://ds.iris.edu/message-center/)
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