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: Digital Image CN Exercise
    From: Marcel Tschudin
    Date: 2010 Apr 6, 23:38 +0300

    OK, Greg. Thanks to Gilda I missed your location only by a little bit
    more than 100 m.
    
    Regarding the height of the oil rig. I tried to do this a bit more
    sophisticated by using also the radius of curvature at this latitude
    in east/west direction. Unfortunately I don't show this value in the
    output. I therefore had to pass step by step through the program. This
    showed to be very helpful for finding two more bugs. This radius of
    curvature is calculated but only the one for the "standard location"
    was used, and the refraction is calculated but the wrong formula is
    selected; the refraction is calculated for the apparent altitude
    instead of the astronomical one. (I can notice a smile in the face of
    Mr. G. Bennett.)
    
    Thank you also for the other two attachments. How do you call this
    bird? It seems to be a little bit bigger than a sparrow ;-)
    
    Marcel
    
    
    
    

       
    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