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
    GPS as a time authority
    From: J Parsons
    Date: 2009 Sep 14, 09:05 -0700

    I think this has been dicussed before, but I'd like to be refreshed on the list's opinion:
    
    While assisting the Race Committee at a regatta this weekend, I heard the 
    timekeepers say that they were using "GPS time."  I noted that my $79 
    wristwatch, which I check monthly against the US Bureau of Standards atomic 
    clock (ph: 303-499-7111) and which doesn't lose a second per month, was 8 
    seconds ahead of the Committee's time.
    
    I later checked the time shown on my hand-held Gartmin GPS receiver, and it 
    agreed with my watch.  The watch was also still in sync with the Bureau's 
    atomic clock.
    
    Question:  Is the time displayed by GPS receivers considered a reliable and 
    spot-on source, up to the requirements of accurate celnav?  I would think 
    that it would be, since the GPS network depends on accurate tracking of the 
    satellites' position at a given time, yet there was that 8-second 
    discrepancy.  Perhaps the Race Committee were simply careless about setting 
    theior clockby GPS.
    
    Any thoughts, List Members?
    
    -John Parsons
    
    
    --~--~---------~--~----~------------~-------~--~----~
    NavList message boards: www.fer3.com/arc
    Or post by email to: NavList@fer3.com
    To unsubscribe, email NavList-unsubscribe@fer3.com
    -~----------~----~----~----~------~----~------~--~---
    

       
    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