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Old 01-16-21, 03:17 AM   #16
Sean C
Grey Wolf
 
Join Date: Jun 2017
Location: Norfolk, VA
Posts: 865
Downloads: 12
Uploads: 2
bullhorn Update!

Links have been updated in the first post. Or, see my sig.



Bug fixes/changes:


  • Fixed the bug preventing the sight reduction cells from clearing correctly ... I think.
  • Delta-T values are now interpolated for dates between table entries. This will have the most noticeable effect on really old dates which cannot be completely trusted anyway.
  • Added a note about compatibility issues. We're just not right for each other. (LibreOffice, not you - you're cool.)
  • Discovered the "Application.ScreenUpdating" VBA object. The spreadsheet generally runs more smoothly after a liberal application to the macros (as you do).
  • Added a nifty sky chart showing the positions of all visible traditional navigational bodies for the currently selected time and location which isn't quite what I intended, but looks pretty cool nonetheless.



I still want to add Sunrise/set/twilight times. And maybe even some other calculators such as "Time Sights" and "Lunars". We'll see ...


Enjoy!


Sean C.
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Celestial Navigation Spreadsheet

Last edited by Sean C; 01-16-21 at 03:34 AM.
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Old 01-23-21, 06:02 AM   #17
Sean C
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Join Date: Jun 2017
Location: Norfolk, VA
Posts: 865
Downloads: 12
Uploads: 2
bullhorn Update!

Bug fixes/changes:

  • Fixed a long forgotten bug causing DRs to be calculated incorrectly when crossing the IDL.
  • Fixed the bug causing the "Send to Log" button to overwrite manual entries.
  • Added a "Data Series" tab which calculates data for a specified period and interval.
  • Created a new bug by doing the above. (See "Instructions" tab.)
  • Added a bar below the sky chart which indicates day/twilights/night.
  • Added notes about stellar positions/magnitudes on the "Instructions" tab.
  • Updated my contact email address. Please do not send mail to the previously listed one. Thank you.




See the first post or my sig for the link.




The new data series calculator can be used to make charts like the following for data comparison or analysis:











Some stats:

Total Sheets: 18
Cells with data: 180,868
Tables: 4
Formulas: 8,373
Charts: 2
Macros: 26
Days I've been working on it so far: 237
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Old 01-23-21, 09:16 AM   #18
Sean C
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Location: Norfolk, VA
Posts: 865
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Icon11 D'oh!

Just found a new bug: the data series calculator gives incorrect distances for stars. That will be fixed in the next version.
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Old 01-27-21, 05:54 PM   #19
Sean C
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Join Date: Jun 2017
Location: Norfolk, VA
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New version is available at my new website:


https://www.cooknavigation.com




Bug fixes/changes:


  • Fixed a bug causing the data series tab to display incorrect distances to some stars.
  • By request: Added Hiva Oa and Nuku Hiva, Fr. Polynesia to the city database.
  • Added unit indicators to the data series table headers.
  • Clarified the note about stellar magnitudes.
  • Added some credits to the "Instructions" tab.


Cheers!
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Old 02-02-21, 07:25 AM   #20
Sean C
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Join Date: Jun 2017
Location: Norfolk, VA
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bullhorn Update!

New version posted at my website.


Changes:


v 0.2.6
  • Added printable bodies list
  • Reformatted notes on "Precession and Stars" tab


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Old 02-06-21, 07:08 AM   #21
Sean C
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Join Date: Jun 2017
Location: Norfolk, VA
Posts: 865
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bullhorn 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:




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Celestial Navigation Spreadsheet

Last edited by Sean C; 02-06-21 at 09:08 AM.
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Old 02-08-21, 12:57 AM   #22
Capt Codetrucker
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Icon14

Hi Sean C - Just a simple word of gratitude for your work and kind generosity. Thank you.
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Old 02-08-21, 10:12 AM   #23
Sean C
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Join Date: Jun 2017
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Uploads: 2
Default

Quote:
Originally Posted by Capt Codetrucker View Post
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!
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Old 02-28-21, 04:19 AM   #24
Sean C
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Join Date: Jun 2017
Location: Norfolk, VA
Posts: 865
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bullhorn 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.
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Old 10-31-21, 09:09 PM   #25
Sean C
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Join Date: Jun 2017
Location: Norfolk, VA
Posts: 865
Downloads: 12
Uploads: 2
bullhorn 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.
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Old 11-02-21, 07:04 AM   #26
Sean C
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Join Date: Jun 2017
Location: Norfolk, VA
Posts: 865
Downloads: 12
Uploads: 2
bullhorn 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.
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Old 11-07-21, 03:20 AM   #27
Sean C
Grey Wolf
 
Join Date: Jun 2017
Location: Norfolk, VA
Posts: 865
Downloads: 12
Uploads: 2
bullhorn Update

I have added the option to the sky chart to display all 1,535 stars in the basic FK5 catalogue (see screenshot, below). As with the navigational stars, corrections for proper motion have been included. There is a check-box below the chart to show or hide them. These will not be selectable in the almanac or sight reduction calculator. But if you hover your mouse over them, the calculated azimuth and altitude will be displayed. So, they can be used for navigation in a pinch ... you'll just have to plot the LOPs manually. Maybe I will change this in the future.

I have also tweaked the map alignment. Waypoints shouldn't be plotted off the edge of the map anymore [mostly], and the waypoints, DR and fix should be plotted a bit more accurately. (Although at this scale I admit it's hard to see the difference.)

As always, the new version is available in the downloads section. Cheers!

v 0.3.3 - 2021, Nov 7

  • Added the option to the sky chart to display all 1,535 stars in the basic FK5 catalogue. (This increased the size of the spreadsheet from 2.5MB to 3.7MB.)
  • Tip: You can hover your mouse over any star to see its calculated azimuth and altitude.
  • Fixed a bug causing the almanac date and time to change when using the data series or rise/set calculators. (Almanac date and time will still change when using the sight reduction tab.)
  • Improved map alignment. Waypoints and DR/Fix will now be plotted more accurately.
  • Minor formatting changes.


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Celestial Navigation Spreadsheet

Last edited by Sean C; 11-07-21 at 06:01 AM.
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Old 10-24-22, 08:38 PM   #28
Sean C
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Join Date: Jun 2017
Location: Norfolk, VA
Posts: 865
Downloads: 12
Uploads: 2
Default

New version available in the downloads section:

v 0.3.4 - 2022, Oct 24
· Added day of the week calculation on Almanac tab.
· Added the option to display the celestial equator and ecliptic to the sky chart.
· Added the ability to increment time on the Almanac tab.
· Updated the delta-T values.
· Moved the "Auto-Fill" button for the date of celestial sights and added an arrow to hopefully clarify the button's purpose.
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