sunix

Groups:

TRACES,MIGRATION,INVERSION,SU,PLOTS

Authors:

Colorado School of Mines (Seismic UNIX programs) Igor B. Morozov, 1/97, major revision 2/98; PVM-based version: 10/03, modified: 01/06

Module description:

Seismic Unix

Runs a sequence of Seismic Unix (SU) processing programs. The SU programs are executed in one or several pipes executed on the same or different compute nodes. Configuration of the hosts is decribed by entry "su" in the job configuration file ("exec"), or in the GUI.

When using multiple parallel SU shells, data traces are sent to the first available shell, and so the trace sort order in the output sequence may be lost.

The choice of programs is determined by the current SU installation. Error messages will be printed if wrong names of codes are used. Program parameterizations are performed exactly as defined in SU.

Because Seismic Unix is based on SEGY data format, only relatively short (< 32767 samples) records can be used and typical reflection seismic sampling intervals can be handled.

Only headers that can be mapped into SU-segy headers will be passed across the SU pipe.

Module call format:

*call SUNIX WHEN OUTPUT

Global list parameter(s):

WHEN

 Operation phase:
  • Edit: module starts the process during the Edit phase and waits for it to finish. and does not send any data to it. Any traces produced by the flow are picked up during the Eof phase of the current job.
  • Process: module initialtes the slave process when the first trace enters it, passes the traces to the slave, and retrieves processed traces as they become available during the Process or Eof phases.
    • .
    • Format: Selection
    • Selectable Values: (codes in parentheses)
      • Edit (EDIT)
      • Process (PROC)
    • Default value: PROC

    OUTPUT

    		 Type of output of the Seismic UN*X shell. If the type of output from the last program in SU pipe is known, this parameter is ignored; otherwise it is important to set it correctly!
    • Format: Selection
    • Selectable Values: (codes in parentheses)
      • Seismic UN*X data pipe (DATA)
      • Text printout into log file (TEXT)
    • Default value: PROC
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    References:

    Seismic Unix programs (http://www.cwp.edu)

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    Known bugs and problems:

    1. Tools sending text printouts to the standard output (like sutab) will not operate properly (the output will not be captured in the log file).

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      IGeoS version 5.1
      Copyright (c) 1995-2015, I.B.Morozov
      Updated Wed Apr 1 21:42:30 2020