Thread: How to normalize my sac files in SAC

Hi Sachin,
You could use several strategies, but here's a simple one to get you going.
Say you've windowed your seismogram within which the peak (or the trough)
whose amplitude you want to use as the normalization factor exists. Then
you would do something like the following,
READ myfile.SAC
SETBB normax &1,DEPMAX
SETBB normin &1,DEPMIN
SETBB normamp (MAX (ABSOLUTE %normax) (ABSOLUTE %normin))
GETBB normamp
DIV %normamp
WRITE norm_myfile.SAC

Parameter DEPMAX is the maximum amplitude and DEPMIN is the minimum
amplitude in your SAC file. Note that if you want to use DEPMIN as your
normalization factor, you have to check if it's negative, and if so,
multiply it by -1 to avoid polarization reversal. In the above I am taking
the maximum of the absolute value of peak or trough. You can build on this.

Januka.

Januka Attanayake
Postdoctoral Research Associate

Institut für Geophysik
Westfälische Wilhelms - Universität Münster
CorrensstraBe 24
48149 Münster
Germany

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

On 16 March 2017 at 11:41, Sachin Tiwari <sachinism15<at>gmail.com> wrote:

Dear SAC users,

I am new to sac. I have bunch of sac files which I want to normalize in
sac. Can you please provide me some guidelines how to do it. For your
reference two sac files are attached with this email.

Any help in this regard will really be appreciated.

Thanks a lot.
--
*Sachin Kumar *
*Junior Research Fellow (JRF)*
*Dept. of Applied Geophysics*
*Indian School Of Mines, Dhanbad*
*Jharkhand- 826004, India.*
*Mobile No.:+91-7631056163 <+91%2076310%2056163>, +91-8540016927
<+91%2085400%2016927>*
*Email : **sachinism15<at>gmail.com <sachinism15<at>gmail.com>*


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