Solar culmination and equation of time Calculator
Calculates a table of changes in the solar culmination and equation of time for a year and draws the chart. | |||
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| ・The factors which equation of time produces are the Earth's orbital eccentricity and axial tilt. ・equation of time ＝ mean solar time − apparent solar time ＝(time zone - longitude/15)＋12h− solar culmination ・If the longitude of the standard time is specified, the mean solar time will become noon. |
Solar culmination and equation of time
| [1-10] /34 | Disp-Num |   |
- Purpose of use
- Several calculators utilized to estimate solar angle for a just iPhone installed solar electrical generating system.
[1] 2021/08/10 17:54 60 years old level or over / A retired person / Very /
- Purpose of use
- Finding True North in the field the old-school way with a stick in the ground.
[2] 2021/07/21 12:30 60 years old level or over / An engineer / Very /
- Purpose of use
- Calculation of sunrise and sunset
[3] 2020/08/22 10:51 30 years old level / Self-employed people / Very /
- Purpose of use
- Study. Celestial Navigation
- Comment/Request
- Just a big Thank You!
[4] 2019/12/18 11:16 60 years old level or over / A retired person / Very /
- Purpose of use
- Will be useful for helping people determine true north with only a watch and a noontime shadow.
- Comment/Request
- Thank you very much for making this great tool available; quite marvelous!
Previous poster might wish to check out MICA, the Multiyear Interactive Computer Almanac for comparisons; http://aa.usno.navy.mil/software/mica/micainfo.php - this is the tool I've used in the past to create my own ET tables and other data tables for surveying programs.
[5] 2018/11/19 12:23 60 years old level or over / A retired person / Very /
- Purpose of use
- To verify equation of time matches my own calculations as an amateur astronomer.
- Comment/Request
- Questionable accuracy?! Im not saying my calculations are more accurate - they are probably worse. I just have no way of verifying your own results. You provide no relevant external links, equations, or discussion on methods. I cannot verify or falsify any of this except to gather equally baseless numbers from a multitude of sites, none of which are ever consistent with one another.
[6] 2018/11/16 20:14 30 years old level / High-school/ University/ Grad student / A little /
- Purpose of use
- looking for formula.
[7] 2018/09/14 12:05 60 years old level or over / A retired person / Useful /
- Purpose of use
- Test case for an embedded Eqn of Time calculation
[8] 2018/08/09 19:52 60 years old level or over / An engineer / Useful /
- Purpose of use
- Correction of sunrise times observed on VLF radio waves propagation along a whole year.
[9] 2018/08/05 17:49 60 years old level or over / An engineer / Very /
- Purpose of use
- A study on the times of the five daily Muslim prayers.
- Comment/Request
- I am wondering if the times of solar culmination are the same as solar meridian crossing. In Islam, the prayer time for Dhuhr (noon prayer) is after the sun has passed its highest elevation, or istiwa.
Please clarify if the highest elevation of the sun for the day is culmination or meridian crossing.
[10] 2018/03/23 09:58 60 years old level or over / A retired people / Useful /
Thank you for your questionnaire.
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