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: The Darn Old Cocked Hat - the sequel 1
    From: Hanno Ix
    Date: 2013 Mar 15, 18:02 -0700
    JK:

    YES! I am plotting some distance related quantity,
    namely, the frequencies of distances  Fix-TL.
    vs. those very distances themselves. Azimuth is ignored.

    I want to be able to say:
    The TL is most likely that-and-that number of seamiles away from my fix. or equvalently:
    My fix  ...                                                               ..... from the TL.

    h





    From: John Karl <jhkarl---.net>
    To: hannoix---.net
    Sent: Friday, March 15, 2013 3:04 PM
    Subject: [NavList] Re: The Darn Old Cocked Hat - the sequel 1


    Marcel,
    Yup, you have it exactly right.
    Your case No. 1 is an estimation problem using sights from an unknown position, but with known LOP probability distributions gathered through many, many, previous measurements, which is your case No. 2.
    This is exactly the (apparently) subtle distinction some of us have been trying to point out.
    Andrew Nikitin appears to be performing your No. 2 above, but now is tabulating MMPs (symmedians) all determined from the same known location (instead of LOPs) -- it's not an estimation problem, like your case No. 1. Rather it's your case No. 2, determining measurement distributions from known facts. His dot figure looks quite believable with the dot density maximum at the true position. But I don't believe his resulting graph of the probability density -- it should obviously be maximum at the true position, as we can see from the dot pattern.
    He, and others Like Nanno and Gary, apparently are plotting some distance related quantity instead of simply the number of events per unit area, versus distance.
    JK
    ----------------------------------------------------------------
    NavList message boards and member settings: www.fer3.com/NavList
    Members may optionally receive posts by email.
    To cancel email delivery, send a message to NoMail[at]fer3.com
    ----------------------------------------------------------------
    View and reply to this message: http://fer3.com/arc/m2.aspx?i=122888


       
    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