Welcome to the NavList Message Boards.

NavList:

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

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: 18 june 2013 lunar distance
    From: Paul Hirose
    Date: 2013 Jul 05, 22:58 -0700

    Brad Morris wrote:
    > Think of it this way, IF you can accomplish it, then you will noted
    > historically as the first person with a real extension of the lunar
    > distance problem in 100 years!!!  That would be quite the feather in your
    > cap.
    
    Strictly with regard to navigation by lunar distances, I believe you're
    right. Nobody (a dangerous word) has yet accounted for the limb profile.
    But in practice is there anything worthwhile to be gained, given the
    accuracy of sextant observations? I doubt it.
    
    But if that little correction is to be pursued, I suggest looking at the
    software of the occultation people. The limb profile is routine business
    to them.
    
    http://www.lunar-occultations.com/iota/iotandx.htm
    http://www.lunar-occultations.com/iota/occvalue.htm
    
    I have no plans to add that to my software! Although I am highly
    interested in the discrepancy discussed in this thread, it's not because
    17 mas is significant in navigation by lunar distances. The reasons are
    1) some of my code may be re-used in another application where such an
    error is not acceptable, and 2) just because the discrepancy is only 17
    mas in this case, it doesn't follow that it will be that small in other
    cases, and 3) I'm can't rest easy with a possible mistake in my code.
    
    --
    I filter out messages with attachments or HTML.
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    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:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    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