Slow Time
A nice concept, considering our recent discussions on timekeeping: http://www.kickstarter.com/projects/scottthrift/the-present?ref=NewsOct1311 http://www.kickstarter.com/projects/scottthrift/the-present?ref=NewsOct1311 utm_campaign=Oct13utm_medium=emailutm_source=newsletter utm_campaign=Oct13utm_medium=emailutm_source=newsletter Dave --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: solar time calculator
Not sure what you did wrong, but you can download Time Zone Master for free from www.relativedata.com which shows sundial time for any location, and corrects for EoT, light refraction, aberration, nutation and precession, as well as any of about 100 different timezone rules. On 2011-10-13 23:10, Donald Christensen wrote: Not sure what I'm doing wrong I wrote a program so that I can set my watch to solar time. Something is wrong. Either my program is wrong or my sundial is inaccurate. To use the program Set your computer accurately to clock time Run the macro 'recalc'. This will make the clock on your computer display on the spreadsheet in real time. This will also input today's date. This date will lookup the EOT and either add or subtract the time Set your watch to solar time The purple cell is for troubleshooting. 1 = add the eot values (positive or negative). -1 will subtract these values. Once I figure out which one to use, it will be true for all days. At the moment, neither work My objective is to make a solar compass that will work for my area only I'll simply rotate the sundial that I designed with longitude correction until it agrees with my watch that I set to solar time. I understand that the EOT has accuracy problems. However, I thought it was accurate enough for what I want it for. I'd like your feedback on that. I'd also like your feedback on whether or not my goal is realistic in spite of the accumulation of small errors such as eot, sundial accuracy, gnomon placement and gnomon perpendicular to the dial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- No Are you supposed to post replies below the message? --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: solar time calculator
Hi sorry I phrased it wrong. I want to find north by using my sundial which has been designed with longitude correction. Therefore, I'm not after a solar time calculator. I just want a clock that will compensate the EOT However now that I have Time Zone Master, (thank you David) I'll make another sundial without longitude correction and compare it to the other. Donald On Fri, Oct 14, 2011 at 1:32 PM, David Patte dpa...@relativedata.comwrote: Not sure what you did wrong, but you can download Time Zone Master for free from www.relativedata.com which shows sundial time for any location, and corrects for EoT, light refraction, aberration, nutation and precession, as well as any of about 100 different timezone rules. On 2011-10-13 23:10, Donald Christensen wrote: Not sure what I’m doing wrong I wrote a program so that I can set my watch to solar time. Something is wrong. Either my program is wrong or my sundial is inaccurate. To use the program Set your computer accurately to clock time Run the macro ‘recalc’. This will make the clock on your computer display on the spreadsheet in real time. This will also input today’s date. This date will lookup the EOT and either add or subtract the time Set your watch to solar time The purple cell is for troubleshooting. 1 = add the eot values (positive or negative). -1 will subtract these values. Once I figure out which one to use, it will be true for all days. At the moment, neither work My objective is to make a solar compass that will work for my area only I’ll simply rotate the sundial that I designed with longitude correction until it agrees with my watch that I set to solar time. I understand that the EOT has accuracy problems. However, I thought it was accurate enough for what I want it for. I’d like your feedback on that. I’d also like your feedback on whether or not my goal is realistic in spite of the accumulation of small errors such as eot, sundial accuracy, gnomon placement and gnomon perpendicular to the dial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorizeduse of this email is subject to penalty of law. So there! ---https://lists.uni-koeln.de/mailman/listinfo/sundial -- No Are you supposed to post replies below the message? --- https://lists.uni-koeln.de/mailman/listinfo/sundial -- Cheers Donald 0423 102 090 This e-mail is privileged and confidential. If you are not the intended recipient please delete the message and notify the sender. Un-authorized use of this email is subject to penalty of law. So there! --- https://lists.uni-koeln.de/mailman/listinfo/sundial
Re: solar time calculator
On Fri, Oct 14, 2011 at 01:10:50PM +1000, Donald Christensen wrote: Not sure what I?m doing wrong ... I?ll simply rotate the sundial that I designed with longitude correction until it agrees with my watch that I set to solar time. Sorry if this is too obvious.. is your sundial equiangular? Karl --- https://lists.uni-koeln.de/mailman/listinfo/sundial
