i.albedo (1)
NAME
i.albedo - Computes broad band albedo from surface reflectance.
KEYWORDS
imagery, albedo, reflectance, satellite, Landsat, ASTER, AVHRR, MODIS
SYNOPSIS
i.albedo
i.albedo --help
i.albedo [-mnl8acd] 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)
-8
Landsat 8 (7 input bands:1,2,3,4,5,6,7)
-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 uses for Landsat 8 the weighted average reflectance (temporary until algorithm is found).
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
References
For a 2 band determination of the Aster BB Albedo see the following: Salleh and Chan, 2014. Land Surface Albedo Determination: Remote Sensing and Statistical Validation. in proceedings of FIG 2014. https://www.fig.net/resources/proceedings/fig_proceedings/fig2014/papers/ts05g/TS05G_salleh_chan_6910.pdf
AUTHOR
Yann Chemin
Last changed: $Date: 2015-12-30 18:02:16 +0100 (Wed, 30 Dec 2015) $
SOURCE CODE
Available at: i.albedo source code (history)
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