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: Lat/Lon by "Noon Sun" & The Noon Fix PROVE IT
    From: James N Wilson
    Date: 2009 Apr 15, 11:39 -0700

    A difference between my method and Frank's is that I establish two slopes
    of the altitude time line, rather than look at the entire curve.
    Accordingly, I need a few more measurements early and late, since I can't
    establish accurate slopes from the data you presented. For this latitude,
    I would start 30 minutes before estimated LAN, and establish the second
    slope from measurements in the same altitude range as the first set. Can
    you give me this data? It's work for me to read Excel, so the data in
    tabular format would be fine.
    Additionally, I read the declination around noon UT on December 21, 2008
    as S23�26.4'. I translate that to -23.434 decimal. Did I miss something?
    Perhaps I should just use what you gave. It's not a problem.
    Jim Wilson
    Save $10 on Flowers and Gifts!
    Shop now at www.ftd.com/16714
    Navigation List archive: www.fer3.com/arc
    To post, email NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com

    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