i.albedo.1grass man page

i.albedo — Computes broad band albedo from surface reflectance.

Keywords

imagery, albedo, reflectance

Synopsis

i.albedo
i.albedo --help
i.albedo [-mnlacd] input=name[,name,...] output=name [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags

-m
MODIS (7 input bands:1,2,3,4,5,6,7)
-n
NOAA AVHRR (2 input bands:1,2)
-l
Landsat 5+7 (6 input bands:1,2,3,4,5,7)
-a
ASTER (6 input bands:1,3,5,6,8,9)
-c
Aggressive mode (Landsat)
Albedo dry run to calculate some water to beach/sand/desert stretching, a kind of simple atmospheric correction
-d
Soft mode (MODIS)
Albedo dry run to calculate some water to beach/sand/desert stretching, a kind of simple atmospheric correction
--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[,name,...] [required]
Name of input raster map
output=name [required]
Name for output raster map

Description

i.albedo calculates the albedo, that is the Shortwave surface reflectance in the range of 0.3-3 micro-meters. It takes as input individual bands of surface reflectance originating from MODIS, AVHRR, Landsat or Aster satellite sensors and calculates the albedo for those. This is a precursor to r.sun and any energy-balance processing.

Notes

It assumes MODIS product surface reflectance in [0;10000].

Todo

Maybe change input requirement of MODIS to [0.0-1.0]?

See Also

r.sun, i.vi

Author

Yann Chemin, International Rice Research Institute, The Philippines

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

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