Almanac and Celestial Navigation Calculator

Sean C · 02-02-21, 07:25 AM

New version posted at my website.

Changes:

v 0.2.6

Added printable bodies list
Reformatted notes on "Precession and Stars" tab

Sean C · 02-06-21, 07:08 AM

New version at my website.

beta v 0.2.7 Bug fixes/changes:

Fixed a bug causing the intercept "away/toward" cell for sight #10 to remain empty
Updated the cities database from ~15,500 cities to Pareto's current [free] offering: 26,570 cities (+ the two suggested cities)

*** The spreadsheet is now also in the "Utilities" section of the SubSim downloads area. ***

And here's an animation I made showing "Xerxes' Eclipse" on Oct. 2nd, 480 BC:

02-08-21, 12:57 AM

Hi Sean C - Just a simple word of gratitude for your work and kind generosity. Thank you.

Sean C · 02-08-21, 10:12 AM

Quote:

Originally Posted by Capt Codetrucker

Hi Sean C - Just a simple word of gratitude for your work and kind generosity. Thank you.

You're very welcome!

By the way, I just added my PostScript plotting sheets to my site. I'll upload them here too, if there's any interest in them.

Cheers!

Sean C · 02-28-21, 04:19 AM

New version available in the downloads section.

v 0.2.8 - 2021, Feb 28

Increased the number of decimals of azimuth included in the data series to a ridiculous precision.
Fixed a bug causing the spreadsheet to display wildly inaccurate values for the equation of time under certain circumstances.

Sean C · 10-31-21, 09:09 PM

New version available in the downloads section.

v 0.3.1 - 2021, Oct 31

Added rise, set, transit and twilight calculator.
Increased precision of azimuths on the printable list to 0.1°.
Added button to Data Series calculator to get the date and time from the Almanac.
Added ecliptic longitude of Sun, Moon and planets to the Data Series calculator to facilitate determination of the times of equinoxes, conjunctions, etc.
Corrected a minor error in the calculation of Ha of the LL of the Moon and Sun at extremely low altitudes.
Added PA correction to the Sun.
Updated delta-T table.
Extended visibility chart to -5°.
Minor formatting changes.

Sean C · 11-02-21, 07:04 AM

Apologies, but I just found a bug ... of course. And it's a bug I thought I had already squashed. Maybe I'll get it right this time ...

[Link]

v 0.3.2 - 2021, Nov 2

Fixed a bug [again] causing the spreadsheet to display incorrect values for the equation of time under certain circumstances.

02-06-21, 07:08 AM	#2
Sean C Grey Wolf Join Date: Jun 2017 Location: Norfolk, VA Posts: 988 Downloads: 16 Uploads: 2	Update! New version at my website. beta v 0.2.7 Bug fixes/changes: Fixed a bug causing the intercept "away/toward" cell for sight #10 to remain empty Updated the cities database from ~15,500 cities to Pareto's current [free] offering: 26,570 cities (+ the two suggested cities) * The spreadsheet is now also in the "Utilities" section of the SubSim downloads area. * And here's an animation I made showing "Xerxes' Eclipse" on Oct. 2nd, 480 BC: __________________ If you have a question about celestial navigation ... ask me! Celestial Navigation Spreadsheet Last edited by Sean C; 02-06-21 at 09:08 AM.

02-28-21, 04:19 AM	#5
Sean C Grey Wolf Join Date: Jun 2017 Location: Norfolk, VA Posts: 988 Downloads: 16 Uploads: 2	Update! New version available in the downloads section. v 0.2.8 - 2021, Feb 28 Increased the number of decimals of azimuth included in the data series to a ridiculous precision. Fixed a bug causing the spreadsheet to display wildly inaccurate values for the equation of time under certain circumstances. __________________ If you have a question about celestial navigation ... ask me! Celestial Navigation Spreadsheet

10-31-21, 09:09 PM	#6
Sean C Grey Wolf Join Date: Jun 2017 Location: Norfolk, VA Posts: 988 Downloads: 16 Uploads: 2	Update New version available in the downloads section. v 0.3.1 - 2021, Oct 31 Added rise, set, transit and twilight calculator. Increased precision of azimuths on the printable list to 0.1°. Added button to Data Series calculator to get the date and time from the Almanac. Added ecliptic longitude of Sun, Moon and planets to the Data Series calculator to facilitate determination of the times of equinoxes, conjunctions, etc. Corrected a minor error in the calculation of Ha of the LL of the Moon and Sun at extremely low altitudes. Added PA correction to the Sun. Updated delta-T table. Extended visibility chart to -5°. Minor formatting changes. __________________ If you have a question about celestial navigation ... ask me! Celestial Navigation Spreadsheet

11-02-21, 07:04 AM	#7
Sean C Grey Wolf Join Date: Jun 2017 Location: Norfolk, VA Posts: 988 Downloads: 16 Uploads: 2	Update Apologies, but I just found a bug ... of course. And it's a bug I thought I had already squashed. Maybe I'll get it right this time ... [Link] v 0.3.2 - 2021, Nov 2 Fixed a bug [again] causing the spreadsheet to display incorrect values for the equation of time under certain circumstances. __________________ If you have a question about celestial navigation ... ask me! Celestial Navigation Spreadsheet

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02-02-21, 07:25 AM	#1
Sean C Grey Wolf Join Date: Jun 2017 Location: Norfolk, VA Posts: 988 Downloads: 16 Uploads: 2	Update! New version posted at my website. Changes: v 0.2.6 Added printable bodies list Reformatted notes on "Precession and Stars" tab __________________ If you have a question about celestial navigation ... ask me! Celestial Navigation Spreadsheet

02-08-21, 12:57 AM	#3
Capt Codetrucker Stowaway Posts: n/a Downloads: Uploads:	Hi Sean C - Just a simple word of gratitude for your work and kind generosity. Thank you.