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: Systematic Error (LOPs revisited)
    From: Bill Noyce
    Date: 2003 May 28, 11:23 -0400

    Peter Fogg:
    > >Lets start with those 2 intersecting LOPs. If there is a systematic error
    > >then it will be either towards the direction of the 2 azimuths or away.
    
    George Huxtable:
    > Sorry, but I'm lost already. Presumably Peter is discussing here LOPs from
    > compass bearings of landmarks.
    
    I think the later discussion makes clear that Peter is discussing
    LOP's from celestial observations.  In that case, if you draw
    an arrow from each LOP, toward the body observed, then one "quadrant"
    has both arrows pointing to it, one has both arrows pointing away,
    and two "quadrants" have a mismatch.  If the errors in the two
    observations have the same sign, then the true position must be
    in one of the two matching quadrants; if the errors are equal,
    the true position must be on the angle bisector that passes through
    these two quadrants.
    
    Of course, in the two-observation case, there's no information to
    estimate whether systematic errors are likely.
    
            -- Bill
    
    
    

       
    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