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: Curious star charts
    From: David Pike
    Date: 2020 Nov 18, 01:08 -0800

    I said: Of course, the figures on the left are hours and minutes.  If we were sure there wasn't too much missing between the ends we could find the period and hence the orbital height and speed.  Knowing the tilt as well, about 31 degrees, we might be able to identify which satellite we were supposed to be observing. 

    The only problem with that theory is that at around one hour 18 minutes orbit we'd need to start looking for a satellite orbiting about 350km below the Earth's surface.  Might there be a correction for Earth rotation built in to the figures?  The stars are too far away for it to matter, but the satellite won't be.  Come on you mathematicians; it's time to help out.  DaveP

    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