[GRASS-user] Calculation of exitance angle

[andrew haywood]

Dear List,

We are currently working on normalising some landsat scenes using a
topographic and illumination correction.
We have calculated the solar incidence angle using a dem and r.sun. We are
now looking to calculate the existance angle for Landsat. Has anybody have
advice on how to calculate this using r.mapcalc or other functions.

Thank you in advance.

cheers
Andrew Haywood
(australia)
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