MB-System Unix Manual Page: mbm_xbt

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    mbm_xbt
    Section:  MB-System 5.0  (1)
    Updated:  26 October 2009
    Index

    NAME

    mbm_xbt - Calculate sound speed from XBT data.

    VERSION

    Version 5.0

    SYNOPSIS

    mbm_xbt -Iinfile [-Fformat
    -Llatitude -Ssalinity -V -H]

    DESCRIPTION

    mbm_xbt is a perl shellscript to translate various XBT data sets
    from depth and temperature into depth and sound speed.  Header
    lines are  turned into comments beginning with '#' characters. The
    output filename consists of the input filename with the suffix ".sv".
    The conversion is done using the DelGrosso equation as referenced
    in Dusha et al. [1993] (reference below).

    AUTHORSHIP

    David W. Caress (caress@mbari.org)

      Monterey Bay Aquarium Research Institute

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

      Lamont-Doherty Earth Observatory

    Suzanne H. O'Hara (sohara@ldeo.columbia.edu)

      Lamont-Doherty Earth Observatory

    OPTIONS

    -F

    format

    Allows the user to select the type of XBT data. Currently supported
    formats are: 1 = Sparton XBT, 2 = Sippican MK12 XBT, 3 = Sippican MK21.
    Default: format = 2.
    -H

    This "help" flag cause the program to print out a description
    of its operation and then exit immediately.
    -I

    file

    Data file from which the input data will be read.
    -L

    latitude

    Latitude of the XBT cast.
    -S

    salinity

    Sets the salinity used to calculate sound speed from temperature
    and depth. The default value of 35 ppt may be significantly
    in error in some areas.  Default: salinity = 35.
    -V

    Causes mbm_xbt to operate in "verbose" mode so that it outputs
    more information than usual.

    NOTES

    There is a hard limit in the code that prevents temperatures less than
    -2.0 degrees C from being used. Input lines containing temperatures less
    than -2.0 will be ignored.

    SEE ALSO

    mbsystem(l), mbprocess(l), mbset(l),
    mbvelocitytool(l), mblevitus(l)

    REFERENCES

    Dusha, B. D., P. F. Worcester, B. D. Cornuelle, B. M. Howe,
    On equations for the speed of sound in seawater, J. Acoust. Soc. Am.,
    93, 255-275, 1993.

    BUGS

    Let us know.

     Index

    NAME
    VERSION
    SYNOPSIS
    DESCRIPTION
    AUTHORSHIP
    OPTIONS
    NOTES
    SEE ALSO
    REFERENCES
    BUGS

Last Updated: 26 October 2009

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