mbsegyinfo
Section:  MB-System 5.0  (l)
Updated:  22 September 2004 
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.

 
AUTHORSHIP

David W. Caress (caress@mbari.org)




  Monterey Bay Aquarium Research Institute



Dale N. Chayes (dale@ldeo.columbia.edu)




  Lamont-Doherty Earth Observatory

 
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


          Auxilliary 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(l), mbextractsegy(l), mbsegylist(l), mbsegygrid(l),
SIOSEIS(http://sioseis.ucsd.edu/ )

 
BUGS

Maybe. Depends on who's asking...



 
Index

NAME

VERSION

SYNOPSIS

DESCRIPTION

AUTHORSHIP

OPTIONS

EXAMPLES

SEE ALSO

BUGS

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