Thread: SEGY 2 SAC

Started: 2012-07-05 06:27:50
Last activity: 2012-07-05 15:26:22
Topics: SAC Help
Juan Lorenzo
2012-07-05 06:27:50
Dear All:

I am running the latest passoft rpm on a 64-bit RHEL6 system.

(I start with SU data and convert it to SEGY data)

I am trying to convert segy data into sac format. (The segy data can
be read by pql)

I then run sierra2segy -g followed by segy2sac.

Although I get no error messages, the output from sierra2segy only
generates files that are 240 bytes long,
which I can not read with pql. The segy2sac produces no output.

I am guessing my issues arise from the segy binary header (400 byte)
that may be lacking an important
header value.

Does anyone have a small segy file they have converted successfully
into sac? If so
I could compare what is missing in my file and perhaps discover the
cause of my problem.

I would appreciate any other suggestions you may have.

Thanks for your time and advice in advance.

Juan Lorenzo

--
LSULSULSULSULSULSULSULSULSULSULSULSULSULSULSULSULSU


Juan M. Lorenzo
Associate Professor
Dept. Geology and Geophysics
Howe-Russell Building Room E235
Corner South Campus/Tower Drives
Louisiana State University
Baton Rouge, LA 70803-4101

Tel.: (225) 578-4249
Fax: (225) 578-2302
Seismic Shop: (225) 578-3424
Computer Lab: (225) 578-4816

e-mail: gllore<at>lsu.edu
URL: http://www.geol.lsu.edu/jlorenzo



  • George Helffrich
    2012-07-05 15:26:22
    Dear Juan -

    SAC's READ command will directly read SEGY files (in PASSCAL's variant of SEGY). See the command description information for READ.

    On 5 Jul 2012, at 05:27, Juan M Lorenzo wrote:

    Dear All:

    I am running the latest passoft rpm on a 64-bit RHEL6 system.

    (I start with SU data and convert it to SEGY data)

    I am trying to convert segy data into sac format. (The segy data can be read by pql)

    I then run sierra2segy -g followed by segy2sac.

    Although I get no error messages, the output from sierra2segy only generates files that are 240 bytes long,
    which I can not read with pql. The segy2sac produces no output.

    I am guessing my issues arise from the segy binary header (400 byte) that may be lacking an important
    header value.

    Does anyone have a small segy file they have converted successfully into sac? If so
    I could compare what is missing in my file and perhaps discover the cause of my problem.

    I would appreciate any other suggestions you may have.

    Thanks for your time and advice in advance.

    Juan Lorenzo

    --
    LSULSULSULSULSULSULSULSULSULSULSULSULSULSULSULSULSU
    Juan M. Lorenzo
    Associate Professor
    Dept. Geology and Geophysics
    Howe-Russell Building Room E235
    Corner South Campus/Tower Drives
    Louisiana State University
    Baton Rouge, LA 70803-4101
    Tel.: (225) 578-4249
    Fax: (225) 578-2302
    Seismic Shop: (225) 578-3424
    Computer Lab: (225) 578-4816
    e-mail: gllore<at>lsu.edu
    URL: http://www.geol.lsu.edu/jlorenzo


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    George Helffrich
    george.helffrich<at>bris.ac.uk



00:39:23 v.22510d55