Dear John, The Sun API is a software component that will do all EOT/ Declination plus a lot of conversion between units etc. www.sunlitdesign.com/products/thesunapi
The program works in degrees (which is convenient for mortals) and implements Meeus's algorithms. The program is accurate to within 250ms for EOT (compared to MICA/ ICE). The program also has routines which will find the time of solstices and equinoxes. The program works in two modes. One is the MJD (Modified Julian Day based on UT) and the other .... is perfect for building real sundials. The second time base (SDY) gives for any time of any day of the year - an average value for EOT/ Declination for the next century. For John's purposes, the ability of the program to work with Excel is a real bonus. A table of eot values for every 10 seconds during an observation period can easily be generated. Check it out. The author David Pratten Sunlit Design > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of John Carmichael > Sent: Friday, 13 June 2003 4:14 AM > To: Sundial List > 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> > > > - > > -
