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: Wobbly Prime Meridian
    From: G Becker
    Date: 2010 Nov 23, 05:09 -0800

    there are a few reasons why your gps is off.

    1.) your gps is a "recreational grade" unit. If the wind was at your back, all the stars lined up, and you had your lucky rabbits foot with you.... you would be lucky to get within 3 feet / 1 meter of a point.

    2.) if the satalites were in a poor distribution (bad angles in the horizon & low number of satalites) in the sky you would have a poor PDOP. Bad PDOP usually will give you bad sollutions. Add a bad PDOP to a recreation grade GPS and you get gobbeldy goop.

    A $30,000 "survey grade" GPS can only get within a +/-6mm of a point.

    The cost of a GPS unit is based on the quality of the software solution & internal chip in the GPS unit. Generally speaking, all GPS units have the same antenna. The BIG, HUGE difference is the processing chip and the internal software.
    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