[SAC-HELP] ASCII to SAC
Arthur Snoke
snoke at vt.edu
Wed Nov 4 13:10:28 PST 2009
You do not have to construct a SAC header from scratch. SAC has
subroutines that can be called in C or Fortran programs that put things in
the right place. In SAC, enter
SAC> help tutorial
and read the section on reading and writing data files.
On Wed, 4 Nov 2009, Januka Attanayake wrote:
> Hello everyone,
> I have a time series of synthetic traces and would like to convert them to
> SAC format. I know I could use the CONVERT function but before that I have
> to format the ASCII (time series) file by arranging the values for sac
> header. Is there a utility to do this pre-formatting before I could use the
> CONVERT function?
> ex. I believe my ASCII file should look like the following before using
> CONVERT
> 0.125 -7441.313 4087.937 1 -12345
> -12.73499 4.265015 -1145.083 -0.7329407 2
> -7.154175 -11.04712 -5.158936 -12345 -12345
> -12345 -12345 -12345 -12345 -12345
> -12345 -12345 -12345 -12345 -12345
> -12345 -12345 -12345 -12345 -12345
> -12345 49.69189 11.22172 499.5 0
> -18.58 -177.847 -12345 406800 6.3
> 153.6304 92.23995 118.4234 -12345 -12345
> -12345 -12345 -12345 -12345 -12345
> 16459.75 348.8256 16.44247 148.1168 -12345
> -12345 11.20899 0 0 -12345
> -12345 -12345 -12345 -12345 -12345
> -12345 -12345 -12345 -12345 -12345
> 2007 8 21 11 25
> 723 6 0 0 137
> -12345 3 -12345 -12345 -12345
> 1 7 -12345 -12345 -12345
> -12345 -12345 -12345 -12345 -12345
> -12345 -12345 -12345 -12345 -12345
> -12345 -12345 -12345 -12345 -12345
> 1 0 1 1 0
> GRA1 -12345
> -12345
> PKP PKIKP PKiKP
> -12345 -12345 -12345
> -12345 -12345 -12345
> -12345 -12345 -12345
> -12345 -12345 BHZ
> GR -12345 -12345
> -187.3201 -188.5614 -217.869 -206.1952 -207.0166
> -215.3447 -195.2354 -180.3634 -132.7042 -73.69939
> -41.64182 20.88158 27.19209 49.59732 147.0182
> 84.607 63.40969 54.25536 80.00433 81.05703
> 88.90465 90.763 85.95925 49.39476 22.92792
> -49.27525 -137.7821 -148.9169 -235.7549 -260.8252
> -287.5518 -289.338 -262.7619 -247.1613 -195.9543
> -143.929 -87.96223 -55.86754 42.96152 41.11675
> 88.47706 110.7524 203.3549 248.1527 288.513
> 289.4476 425.0559 414.4856 489.2326 529.2755
> 708.3331 979.9971 1099.924 1216.979 1358.369
>
> I am not sure how I could get the values related to sac header organized (a
> program?). Any ideas?
>
> Thank you very much.
>
> Januka.
> --
> "Nothing can start to exist nor can cease to exist, only transformation is
> possible"
>
> Januka Attanayake
> Solid Earth Geophysics & Economics
> University of Connecticut
> Beach Hall U-2045
> 354,Mansfield Rd;
> Storrs.CT 06269
>
> Tel: 1 860 486 0475
> URL: http://sites.google.com/site/janukaattanayake/
>
>
>
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