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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: R: Solutions to Gray's 100 Problems (Problem 1-1)
From: Parsa
Date: 2007 Sep 26, 16:56 -0700
From: Parsa
Date: 2007 Sep 26, 16:56 -0700
Thanks. Did you measure these from a single assumed position, or did you use different assumed positions for each sight. I did the latter, taking the longitude minutes of my assumed positions to equal those from the almanac table. I understand that using a calculator or computer, one does not need even degrees to do sight reduction as is done with the tables. Parsa On Sep 26, 4:31 pm, "Federico Rossi"wrote: > Hi, > I've just found my notebook with the solutions to the problems. > I worked the sights with the classical haversine method and got the > following intercepts: > Kochab -1.9 Az 339 > Rasalhague -14 Az 233 > Alkaid -5.6 Az 311 > Altair -4.1 Az 176 > Venus +10.1 Az 97.5 > Moon +4.4 Az 150 > This gave me a fix at 40 13.5 N 49 58.5 W, which is practically identical to > the solution given by the book. > Hope this can help. > Federico > > -----Messaggio originale----- > Da: NavList@fer3.com [mailto:NavList@fer3.com] Per conto di > Parsa > Inviato: gioved� 27 settembre 2007 0.22 > A: NavList > Oggetto: [NavList 3275] Solutions to Gray's 100 Problems (Problem 1-1) > > Hi, I'm new to the list. > > Speaking of the moon... I am working through Leonard Gray's book One > Hundred Problems in Celestial Navigation. I calculated and plotted all > the sights for the stars, the moon's lower limb, and Venus for the > first problem (1-1). My solutions for the stars and Venus seem OK, but > my line-of-position for the moon seems quite a ways off. I get a > pretty good solution without the moon (not more than one minute off of > the given answer, and that's using an 8.5 x 11 plotting sheet). > Is there anyone that has saved their solution to this in notes > somewhere? I would like to see if it is supposed to be so far off, or > if I left out one of the many corrections for the moon. The stars > using Pub 249 were sure much easier! > > Secondly, does anyone know of any online celnav worksheet forms? I > downloaded the ones by Harold Arsem from the celestialnavigation.net > website, but I thought I would find more on the internet than just a > couple forms. > > Parsa --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---