NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Constructing A Logarithm Table
From: Frank Reed
Date: 2009 Jan 11, 19:27 -0800
From: Frank Reed
Date: 2009 Jan 11, 19:27 -0800
Hewitt, you wrote: "(In high school we use to call them 'slime' and 'co-slime')." LOL. I had the happy advantage of learning celestial navigation, and some of the associated trig, a year before studying the subject in school, so the "slimeys" were old friends to me. And: "Anyway, I've never had occasion to grapple with a spread-sheet." Oh, what a shame! They're great fun for this sort of thing. I write quite a lot of stand-alone software, but when I want to work out celestial navigation calculations, I almost always start with a spreadsheet. If you need a table of haversines for every tenth of a degree, you can assemble one in about... hmmm... I'll time myself... OK. Done. It took me five minutes and that included some time making a nice graph (I got distracted). Do you know if you have a spreadsheet program pre-installed on your computer? Are you on Windows? Mac? And you wrote: "Come to think of it, there's a nice little book that has the S/CoS formulas for direct solution of the undivided triangle for Hc and Z - backup is the NAO reduction table with a more lucid explanation. Also has a long-term almanac of Aries and Sun; pub. by Starpath School of Navigation." Yes, there are quite a few nice books out there that spell it all out. Some even have *your* name on the cover. :-) -FER --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---