MB-System Unix Manual Page

mbsegyinfo

Section: MB-System 5.0 (1)
Updated: 3 June 2013
Index
 

NAME

mbsegyinfo - Output some basic statistics of segy format seismic data files.

 

VERSION

Version 5.0

 

SYNOPSIS

mbsegyinfo [-Ifilename -Llonflip -O -H -V]

 

DESCRIPTION

MBsegyinfo is a utility for reading a segy format seismic data file or files and outputting some basic statistics. The table generated shows the filename, data counts, navigation totals, time and navigation of the first and last data records, minimum and maximum data values, and the geographic bounding box of the data.

An important function of mbsegyinfo is to generate segy information, or ".sinf" files, that may be parsed by other MB-System programs and macros. To create an ".sinf" file, simply direct the output of mbsegyinfo to a file named by adding the suffix ".sinf" to the input swath data filename. The -O option accomplishes this same task automatically.

 

MB-SYSTEM AUTHORSHIP

David W. Caress

  Monterey Bay Aquarium Research Institute
Dale N. Chayes

  Center for Coastal and Ocean Mapping

  University of New Hampshire
Christian do Santos Ferreira

  MARUM - Center for Marine Environmental Sciences

  University of Bremen

 

OPTIONS

-H
This "help" flag cause the program to print out a description of its operation and then exit immediately.
-I
filename
Sets the input segy seismic data filename. Default: infile = "stdin".
-L
lonflip
Sets the range of the longitude values returned. If lonflip=-1 then the longitude values will be in the range from -360 to 0 degrees. If lonflip=0 then the longitude values will be in the range from -180 to 180 degrees. If lonflip=1 then the longitude values will be in the range from 0 to 360 degrees. Default: mbsegyinfo selects the bext longitude range based on the first data.
-O

This option causes the program output to be directed to ".sinf" files rather than to stdout. Each ".sinf" file is named using the original data file path with an ".sinf" suffix appended.
-V
Normally, mbsegyinfo only prints out the statistics obtained by reading all of the data. If the -V flag is given, then mbsegyinfo works in a "verbose" mode and outputs the program version being used and all read error status messages.

 

EXAMPLES

Suppose one wishes to know something about the contents of a segy subbottom profiler data file named 20040722_152111.s7k.segy. The following will suffice:
        mbsegyinfo -I 20040722_152111.s7k.segy

and returns the following output:
        SEGY Data File:      20040722_152111.s7k.segy


        File Header Info:

          Channels:                          1

          Auxiliary Channels:                0

          Sample Interval (usec):           64

          Number of Samples in Trace:     8330

          Trace length (sec):         0.533120
          Data Format:                IEEE 32 bit integer

          CDP Fold:                          0


        Data Totals:

          Number of Traces:               2527

          Min Max Delta:

            Shot number:                    56     2582     2527

            Shot trace:                      1        1        1

            RP number:                      56     2582     2527

            RP trace:                        1        1        1

            Delay (sec):              0.000000 0.000000 0.000000
            Range (m):                0.000000 0.000000 0.000000

            Receiver Elevation (m):   -224.030000 -2.860000 -221.170000

            Source Elevation (m):     -224.030000 -2.860000 -221.170000

            Source Depth (m):         2.860000 224.030000 -221.170000

            Receiver Water Depth (m): 51.510000 487.670000 -436.160000

            Source Water Depth (m):   51.510000 487.670000 -436.160000


        Navigation Totals:


          Start of Data:

            Time:  07 22 2004 15:20:37.029000  JD204

            Lon: -121.8573     Lat:   36.7755


          End of Data:

            Time:  07 22 2004 15:44:15.438000  JD204

            Lon: -121.8572     Lat:   36.7952


        Limits:

          Minimum Longitude:    -121.8574   Maximum Longitude:    -121.8572

          Minimum Latitude:       36.7755   Maximum Latitude:       36.7952

 

SEE ALSO

mbsystem(1), mbextractsegy(1), mbsegylist(1), mbsegygrid(1), SIOSEIS(http://sioseis.ucsd.edu/ )

 

BUGS

Maybe. Depends on who's asking...


 

Index

NAME
VERSION
SYNOPSIS
DESCRIPTION
MB-SYSTEM AUTHORSHIP
OPTIONS
EXAMPLES
SEE ALSO
BUGS


Last Updated: 3 June 2013