Hi John, The longest days are around Christmas. A day than is about 24 hours and 30 seconds. More precisely it is about 22/23 december.
Best wishes, 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: <[email protected]> Sent: Friday, June 13, 2003 3:16 PM Subject: Re: Precise EOT Program > 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> > > > > > > > > > - > > > > > > > - > > > > > - > -
