<div>Hello good people,</div>
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<div>Can anyone suggest how I could use cloud cover (percentage) with r.sun, to generate global radiation maps which account for cloud cover?</div>
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<div>I dont believe I can get the data to calibrate the a and b coefficients as mentioned in the manual. This is why I am hoping there is a simple equation that allows me to use cloud cover percentage directly..I have the cloud cover maps.
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<div>FYI, I am using Grass 6.0.1 on Ubuntu 5.1.</div>
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<div>And I am attempting to generate monthly Potential Evapotranspiration maps from 1960 to 2002 for the Indian subcontinent.</div>
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<div>cheers!</div>
<div>vishal</div>