[SAC-HELP] ASCII to SAC

[Yannik Behr]

We've developed a python package called obspy 
(http://svn.geophysik.uni-muenchen.de/trac/obspy) that allows you 
creating SAC-files from a raw timeseries in python.

Cheers,
Yannik

Arthur Snoke wrote:
> 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/
>>
>>
>>
> 

-- 
Yannik Behr
PhD Student in Seismology
School of Geography, Environment, and Earth Sciences
Victoria University of Wellington
P.O. Box 600
Wellington 6015
New Zealand

yannik.behr at vuw.ac.nz

ph. +64 (4) 463 5233 8369
fax.+64 (4) 463 5186