[OSGeo-Discuss] Atmospheric Corrections

[Johan Oldekop]

Hi All,

Currently trying to do some atmospheric corrections on some Landsat 7 and ASTER images to compare forest cover over two time points. I am thinking of using the GRASS i.atcorr function, which seems relatively straight forward. Unfortunately I do not have the the visibility [km] for the scenes. Is there a way of calculating these from the images? Are there any tables that one can look up, which contain approximate visibility ranges for "very hazy", "moderately hazy" or "low hazy" conditions? Or simply, is there a better, and easier way of doing these corrections?

I would welcome any ideas or suggestions that people might have,


Best

Johan

--------------------------

Dr. Johan Oldekop

Post-Doctoral Research Associate
School of Environment
Washington State University
Salmon Creek Avenue
Vancouver, WA 98686
USA

T: +1 (360) 836 7567 
E: j.oldekop at wsu.edu

Visiting Scientist
Faculty of Life Sciences
The University of Manchester
Michael Smith Building
Oxford Road
Manchester, M13 9PL
UK

T: +44 (0) 7984 771405

www.madasascientist.com

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