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: Accuracy of consumer-grade GPS/GLONASS nav.equipment?
    From: Lu Abel
    Date: 2017 Apr 5, 16:57 +0000
    The primary purpose of WAAS is to allow aircraft land under conditions of near zero visibility.   That means you want a system that will put your aircraft into the center of the runway, not 10 or 15 or 20 meters on either side.   Which, in turn, means that its primary accuracy requirement is at ground level.   Being off by a few dozen or even a few hundred of yards while you're at altitude is inconsequential; not so when a few feet off the ground on final approach.



    From: Bill Lionheart <NoReply_Lionheart@fer3.com>
    To: luabel@ymail.com
    Sent: Wednesday, April 5, 2017 8:00 AM
    Subject: [NavList] Re: Accuracy of consumer-grade GPS/GLONASS nav.equipment?

    My understanding is SBAS/WAAS is for aircraft primarily which is why
    it does not work so well at sea level. Also one suspects GPS is
    optimized for the US  and GLONASS for Russia... is that right you
    would think the military would optimise for where they expect to
    fight.
    
    

       
    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