In message . net,
edgrsprj writes
"DT" wrote in message
...
You're almost exactly right. Civil time is based on the concept of the
'Mean Sun', an imaginary Sun moving at a uniform rate in the equatorial
plane. A sundial will show True time. The difference between the two is
a combination of the elliptical orbit of the Earth, and the inclination
of its axis of rotation to the ecliptic, i.e. The plane in which the
earth moves around the Sun. This difference is known as the Equation of

I understand what you are saying. I am going to have to try to develop a
mental picture of how the Earth axis angle is affecting the transit time.
At first thought I cannot see how it would make a difference.


I couldn't remember this link at the time of my last post, but from a
programming point of view you may find it useful.

Http://www.jgiesen.de/deceot/

This link may help with a mental picture (something I always found
difficult!). It's quite basic but a reasonable start point (see near
bottom of page).

Http://www.shef.ac.uk/physics/people...105/phy105_sol
ar.html

Watch out for word wrap!

Denis
--
DT
Replace nospam with the antithesis of hills