NAME

       i.emissivity  - Computes emissivity from NDVI, generic method for sparse land.

KEYWORDS

       imagery, emissivity, land flux, energy balance

SYNOPSIS

       i.emissivity
       i.emissivity --help
       i.emissivity  input=name  output=name   [--overwrite]   [--help]   [--verbose]   [--quiet]
       [--ui]

   Flags:
       --overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       input=name [required]
           Name of the NDVI map [-]

       output=name [required]
           Name of the output emissivity layer

DESCRIPTION

       i.emissivity calculates the emissivity in the longwave radiation  spectrum,  according  to
       the  semi-empirical  equation  related to NDVI by Caselles and Colles (1997), valid in the
       NDVI range of 0.16 to 0.74.

       Estimation in the 8-14 micrometers range for sparse canopy...

SEE ALSO

        i.eb.netrad

AUTHORS

       Yann Chemin, GRASS Development Team

       Last changed: $Date: 2014-12-09 18:31:29 +0100 (Tue, 09 Dec 2014) $

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