Hello Sunil,
Use READTABLE as George suggested. See my example below, which you can
modify. Also, you can't change KZDATE and KZTIME directly as they are
derived from other header variables.
*SAC> READTABLE CONTENT XY. filename.txt*
For KZDATE, modify NZYEAR and NZJDAY headers.
For KZTIME, modify NZHOUR, NZMIN, NZSEC, and NZMSEC headers.
For more information, go here:
https://ds.iris.edu/files/sac-manual/manual/file_format.html
Januka
Januka Attanayake
Postdoctoral Research Associate
Institute of 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 24 November 2017 at 04:09, George Helffrich <george<at>elsi.jp> wrote:
Dear All -
I would strongly recommend using SAC’s READTABLE command to read
the ASCII data directly and then setting time/date information with SAC’s
CHNHDR command. Wrapping the two commands into a SAC macro would be a
simple task and effective way of mechanizing the operation for conversion
of many ASCII data files.
If you Google for xy2sac you’ll get a similar suggestion.
On 24 Nov 2017, at 11:54, Sunil . <seismo_003<at>rediffmail.com> wrote:
Dear SAC users,
I have a synthetic ASCII file have two column time and amplitude, which
I have converted to sac binary using xy2sac. The problem arises while
setting the origin time of the sac binary file. By default sac binary
origin time is set as -12345. I am not able to change the kzdate. Somehow,
I able to set the kztime having omarker as 4.5275e+11.
How to set the actual kzdate and kztime in the sac binary header. I will
appreciate any help or suggestions.
Thank you,
Sunil
ERI, University of Tokyo
Tokyo
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Sunil .
George Helffrich
Geo .
