# gsw_infunnel

    "oceanographic funnel"
    check for the 25-term equation

## Contents

- USAGE:
- INPUT:
- OUTPUT:
- AUTHOR:
- VERSION NUMBER:

## USAGE:

    in_funnel = gsw_infunnel(SA,CT,p)

## INPUT:

    SA  =  Absolute Salinity                                        [ g/kg ]
    CT  =  Conservative Temperature                                [ deg C ]
    p   =  sea pressure                                             [ dbar ]
            (ie. absolute pressure - 10.1325 dbar)

    SA & CT need to have the same dimensions.
    p may have dimensions 1x1 or Mx1 or 1xN or MxN, where SA & CT are MxN.

## OUTPUT:

    in_funnel  =  0, if SA, CT and p are outside the "funnel"
               =  1, if SA, CT and p are inside the "funnel"
    Note. The term "funnel" describes the range of SA, CT and p over which
      the error in the fit of the computationally-efficient 25-term
      expression for density in terms of SA, CT and p was calculated
      (McDougall et al., 2010).

## AUTHOR:

    Trevor McDougall and Paul Barker    [ help_gsw@csiro.au ]

## VERSION NUMBER:

    2.0 (23rd July, 2010)

    The software is available from http://www.TEOS-10.org