If you want to do a bunch of calculations and work on them with e.g Excel, I
recommend NASA JPL's Horizon's Program. http://ssd.jpl.nasa.gov/horizons.cgi.
It is free, has a nice web interface and computes just about anything
astronomical that you might want (although you have to deduce the EoT f
uot; things like the rising and the setting
of the sun.
Regards, Roger Bailey
From: Bill Gottesman
Sent: Monday, December 20, 2010 8:38 AM
To: Sundial Mailing List
Subject: Wonderful NREL Sun Position Calculator, in time for Solstice fun
Hello Sundial-listers,
I used to rely on Luke Co
Hello Sundial-listers,
I used to rely on Luke Coletti's Great Circle website's GROK
calculator for a precise calculation of sun positions, but that page
has been non-operative for about a year now.
The National Renewable Energy Laboratory (NREL) in Golden Color
