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: Sunset TOV Daytime Venus LOP by Camera
    From: Brad Morris
    Date: 2012 Jun 6, 18:41 -0700

    Hi Greg,

    Er, no.  While manually plotting this would indeed be futile, I was thinking more of Star Pilot, or the like, as a test of the pixel method. 
    Clearly, your position is know as is the time of the picture.  I believe your fix will shift left or right dramatically as the precise pixel height shifts by one pixel.  Of course its sensitive, as a function of the extraordinarily shallow crossing of the LOPs.

    You've got nothing to lose.  Why not try it, and in addition, shift by one pixel either way.  At worst, we blame the shallow LOPs.  At best, you have a good fix. 

    Its a once in a lifetime deal, and as you have worked extensively at the CCD method, it may just be the icing on your cake!

    Best Regards

    On Jun 6, 2012 6:03 PM, "Greg Rudzinski" <gregrudzinski@yahoo.com> wrote:


    The difference in azimuth is only 0.2* so the two LOPs will be basically parallel. No fix. Just an estimated position. If the Moon were involved (eclipse) then one image would generate two parallel LOPs and a lunar longitude for a true one shot fix. You are thinking of the LOP/ex-meridian single observation fix which has about a 10* azimuth difference (not really a fix but a form of running fix).

    Greg Rudzinski

    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

    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