[GRASSLIST:10218] RE: some nice results from r.sun

[José A. Ruiz Arias]

Dear Dylan,

You thought so well since for me it is so interesting to know the strength
of r.sun. I work at the University of Jaén on the solar radiation estimates
in mountainous terrain with very complex topography in Southern-Spain. There
exist some models to do it and, with no doubt, r.sun is a very good choice.
Now I am focusing on the resolution of the DEM and its influence on the
solar radiation estimate with Solar Analyst but my intentions are to move to
r.sun in a short time. For this reason your comments and results are "nice"
for me.

Greetings

José A. Ruiz Arias
Departamento de Física
Campus Lagunillas
Edificio A-3 Despacho 066
Universidad de Jaén
23071 Jaén España
Tlf. +34 953 212474

-----Mensaje original-----
De: owner-GRASSLIST at baylor.edu [mailto:owner-GRASSLIST at baylor.edu] En nombre
de Dylan Beaudette
Enviado el: jueves, 09 de febrero de 2006 4:07
Para: GRASSLIST at baylor.edu
Asunto: [GRASSLIST:10214] some nice results from r.sun

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


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