Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: USCG Student Sample Problems #1, #2 and #3
    From: Peter Hakel
    Date: 2013 Apr 25, 18:15 -0700
    Hello Kermit, Greg,

    I just realized that this difference was caused by a typo on my end: my UT was off by 18 minutes.  I mindlessly hit TAB without zeroing out cell E2 (= Minutes of UT) - because all my other almanac spreadsheets already have 00 preset in there... except this Polaris one!

    So, indeed Lat: N 23d 23.6' and all is well, see attached.  :-)  Thanks for digging into this.

    Peter Hakel

    From: Antoine Couëtte <antoine.m.couette@club-internet.fr>
    About POLARIS... and this concerns Peter Hakel this time (are you here Peter ??)

    " : http://fer3.com/arc/m2.aspx/Group-Project-USCG-student-sample-problems-Couëtte-apr-2013-g23602 "
    and from Auxiliary Position 24°N / 143°40' , observing Polaris at UT 05:00:31 at Sextant Height 23°04'1 (corrected for only Instrument Error), I got a Geocentric Height Ho = 22°52'0 (I concur with Greg's published value) and an intercept of -36.4' (Away) in Azimuth 359°5, hence an Observed Latitude of N 23°23'6 at time of observation UT 05:00:31 (or a shifted latitude of N 23°23'7 at UT 05:00:00).
    ": http://fer3.com/arc/m2.aspx/Group-Project-USCG-student-sample-problems-Couëtte-apr-2013-g23607 " to which I did not read a reply to.
    Peter, while all our other intercepts fully match to +/- 0.1 ' , I still can not reconcile this Latitude I found of 23°23'6 (or 23°23'7) with your value of 23°25'5 published in
    " http://fer3.com/arc/m2.aspx/Group-Project-USCG-student-sample-problems-PeterHakel-apr-2013-g23606 ".
    Any cue from your part, Peter ?


    File: 123694.polaris_corr.xls
    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site