A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Dale Lichtblau
Date: 2014 Sep 26, 13:32 -0700
Thanks Bill (and Gary and Greg).
It's actually the d factor for the sun's daily/hourly declination value that has been puzzling me.
I think I got the equation of time (explaining the d values of 0.0 and 1.0 around the solstices and equinoxes?), but I'm still not clear as to how the correction values have been calculated and tabularized. And exactly how are the I&C tables a multiplication table? An example or two...maybe?
One can enter the table with a value ranging from 0.0' to 18.0' (why this range?), particularly in light of the fact that the largest v value I can find is for Venus at 4.1 back in January.