[Bldg-sim] Approx estimation of solar split from global?

[Philip Haves]

I'm looking for a simple tool (preferably free!) to estimate an 
approximate split of hourly global solar irradiance into direct and 
diffuse components.

Any suggestions?

Thanks!

Phil

-- 
Philip Haves
Leader, Simulation Research Group
Lawrence Berkeley National Laboratory
One Cyclotron Road, MS 90R3145
Berkeley, CA 94720-8134
(510) 486 6512 (office)
(510) 486 4089 (fax)