[GRASS-user] calibration of the Landsat thermal data

[Yann Chemin]

Hi Niels,

in grass-Addons/gipe/ there are a couple of functions to get L1b
Landsat 5/7 into radiant temperature at top of atmosphere.

i.dn2full.l5
i.dn2full.l7

this corrects standard images having .met standard metadata file or
NLAPS metadata (.txt) file.

You may try and see if you get to some useful ends.

You may also see some fast method to get surface temperature from this
product by using emissivity. As it was used for AVHRR 15 years ago.


in Grass-Addons, i.landsat.toar may also help you out, but it is a
long time I have had a look at it.

Cheers,
Yann

2008/9/25 Niels Thevs <thevs at uni-greifswald.de>:
> Dear Grass users,
>
> does anybody have experience with the calibration of the Landsat thermal
> data ? I have a few ground measurements of temperature (air temperature in 2
> m above surface) and want to relate them to a corresponding Landsat image
> (band 6). In the papers which I read there are listed a lot of working steps
> like calibration for at sensor radiance, surface radiance, etc. Is it
> necessary to do all those steps or does anybody know a more simple algorithm
> ?
>
> Best regards
>
> Niels
>
> --
>
>
>
> -----------------------------------------------------
> Dr. Niels Thevs
> Chair of Geobotany and Landscape Ecology
> Institute of Botany and Landscape Ecology
> Greifswald University
> Grimmer Strasse 88
> 17487 Greifswald
> Germany
>
> Tel.: +49-3834-86-4137
> Fax:  +49-3834-86-4114
>
> -----------------------------------------------------
>
>
>
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>



-- 
Yann Chemin
International Rice Research Institute
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