Hi everybody, Thanks to all who wrote. Looks like most people favor the Dialist Companion for precise EOT values.
I need precise EOT for setting my sundials and for precise time readings. I got spoiled at Kitt Peak by Bob Hough's complete list of these EOT values. I can see definite shadow movement in as little as 10 seconds on my large cable dials and I know that EOT values can change more than that in just one day. By the way, does anybody know what the maximum amount EOT changes in 24 hours and on what date this occurs? John John L. Carmichael Jr. Sundial Sculptures 925 E. Foothills Dr. Tucson Arizona 85718 USA Tel: 520-696-1709 Email: [EMAIL PROTECTED] Website: <http://www.sundialsculptures.com> ----- Original Message ----- From: "fer j. de vries" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, June 13, 2003 1:22 AM Subject: Re: Precise EOT Program > John, > > Even if you want a procedure to calculate the EoT at a certain time at a > certain day, what accuracy do you need? > If 5 seconds is enough you could use the year formula calculated by my > program equadecl. > Use as input a decimal daynumber to get the wanted EoT but also correct for > the longitude you are living. > The basic output is for noon GMT. > > If you need higher precision then look for another procedure. > > I also would like to know for what reason you need such a procedure in > dialing. > > Fer. > > > Fer J. de Vries > > De Zonnewijzerkring > mailto:[EMAIL PROTECTED] > http://www.de-zonnewijzerkring.nl > > Home > mailto:[EMAIL PROTECTED] > http://www.iae.nl/users/ferdv/index-fer.htm > Eindhoven, Netherlands > lat. 51:30 N long. 5:30 E > > ----- Original Message ----- > From: "John Carmichael" <[EMAIL PROTECTED]> > To: "Sundial List" <[email protected]> > Sent: Thursday, June 12, 2003 11:14 PM > Subject: Precise EOT Program > > > > Hello all, > > > > I'm looking for a handy precise program that calculates EOT values in > > minutes and seconds at particular times during the day. In other words, I > > don't want the average EOT value for the day as found in the printed > tabular > > EOT values in Mayall & Waugh. Instead, it would give the exact EOT value > at > > a particular time during the day. > > > > I've found several EOT calculator programs (applets) on the "Current Data" > > link at sundials.org. Does anybody know if the values given in these > applets > > are daily averages or precise values? > > > > Thanks for any suggestions. > > > > John > > > > John L. Carmichael Jr. > > Sundial Sculptures > > 925 E. Foothills Dr. > > Tucson Arizona 85718 > > USA > > > > Tel: 520-696-1709 > > Email: [EMAIL PROTECTED] > > Website: <http://www.sundialsculptures.com> > > > > > > - > > > > - > -
