,
Frans Maes
53.1 N, 6.5 E
www.fransmaes.nl/sundials/
- Original Message -
From: John Carmichael [EMAIL PROTECTED]
To: Sundial List sundial@rrz.uni-koeln.de
Sent: Thursday, July 08, 2004 6:44 PM
Subject: EOT + Longitude Correction Table
Hello All,
Some of you wrote me and seemed very
All,
I realize this is not the question John Carmichael originally asked, but I
decided to find out how much the Equation of Time varies over several years on
the SAME month and day. I used Jean Meeus's Astronomical Algorithms, chapter 27
(actually, the method is attributed to W. M. Smart)
correction directly
into my sundial faces so the customer doesn't have to do the longitude
correction, just the EOT correction. This combined EOT+Longitude Correction
Table is very useful if you have an antique pre-timezone sundial or any
sundial that doesn't have a built-in longitude correction
that
incorporates the longitude time correction in its values.
Now do you get it? Neat huh!
For my sundial customers, I usually build the longitude correction directly
into my sundial faces so the customer doesn't have to do the longitude
correction, just the EOT correction. This combined EOT+Longitude
customers, I usually build the longitude correction
directly
into my sundial faces so the customer doesn't have to do the longitude
correction, just the EOT correction. This combined EOT+Longitude
Correction
Table is very useful if you have an antique pre-timezone sundial or any
sundial
List.
- Original Message -
From:
[EMAIL PROTECTED]
To: John Carmichael
Sent: Thursday, July 08, 2004 10:09
AM
Subject: Re: EOT + Longitude Correction
Table
John, I understand what you are saying about a graph that combines both eot
and long-correction for dials
