[GRASSLIST:10214] some nice results from r.sun

[Dylan Beaudette]

Just thought that I would share some nice results from r.sun.

Comparing the daily summed insolation values modeled by r.sun with 2 years of 
solar data from the exact same spot revealed a nice correlation between the 
two:

http://169.237.35.250/~dylan/temp/print_me/2004_2005-comparison-linke.pdf

Note the Linke turbidity values: they empirically monthly averages- and were 
key to tracking the actual insolation values so closely. Also, the default 
Linke value of 3 used for the entire year tracked the variation in measured 
values well, but overestimated the actual values.

Thanks to the authors of r.sun for a job well done!

-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341