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
    Name or NavList Code:
    Email:
       
    Reply
    Re: Position from solar eclipse photo
    From: Frank Reed
    Date: 2013 Nov 19, 13:51 -0800

    Greg Rudzinksi, you wrote:
    "Attached is my plot."

    That's a very impressive plot, Greg. From the appearance of the calculation, it looks like you did it entirely from the astronomical and celestial navigation data. But what do you think? Is your fix astronomical? Also, what's the sensitivity? For example, you got the time by treating the eclipse as a lunar distance observation. Even I, "Lord of the Lunars" (I have just crowned myself), did not use that. How accurate is the UT derived from that. I tried a couple of different ways to estimate the time and could not fix it better than a minute or so by purely astronomical means. But now that we have the exact location (based on overlap between foreground and background objects), we can probably give a rather exact UT for the photo. And I see that you've estimated "Hs" values. I can place lower limits on Hs, of course, but I'm not really sure where the true (or apparent) horizon would be in this photo. How did you estimate that?

    -FER
    ----------------------------------------------------------------
    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
    ----------------------------------------------------------------

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Get a NavList ID Code

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

    A NavList ID Code guarantees your identity in NavList posts and allows faster posting of messages.

    Retrieve a NavList ID Code

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

    Email Settings

    NavList ID 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