The "Australian way", which is also what Fraçois Blateyron does, can be regarded as giving the correction to sundial time to find mean time.
While that in itself is commendable, I really like more the presentation which has the EOT negative in February and positive in November, because the dial is really slow in February and really fast in November, which is represented by the wavy EOT line, whereas Mean Time has always equal-length seconds, and days, and is best represented by the straight horizontal line of zero. If you then add "Sundial Slow" on the February (-) side, and "Sundial Fast" on the November (+) side, I think the users and passers-by will have no difficulty interpreting the meaning. If this is also the "Astronomical" way of doing it (and it is), so much the better :-) Rudolf Hooijenga [EMAIL PROTECTED] (home) [EMAIL PROTECTED] (office) ----- Original Message ----- From: John Hall <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, September 24, 1999 4:22 AM Subject: Equation of Time Graph wrong way up Down Under ? > Can somebody please shed light on a problem I have encountered with the > standard graph of the Equation of Time. > > I have used the routines by Fer de Vries to generate the graph and the print > outs check out perfectly with all standard references. They all indicate > that at this time of the year the correction for the EQT is around +(plus) > 7m 42sec - I checked this with the Luke Coletti web site this morning ;-) > > Now the problem is that all Australian printed references I have checked > suggest that this figure should be - (minus) 7m 42sec. My understanding is > that the EQT is the EQT irrespective of our position on the globe.
