Dear John, Courtesy of The Sun API and Excel.
December 26th/ 27th The greatest difference is .12333 degrees or 29.60 seconds. David > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of John Carmichael > Sent: Friday, 13 June 2003 8:17 PM > To: [email protected] > 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> > > > > > > > > > - > > > > > > > - > > > > > - > > -
