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: Budgets
    From: Lu Abel
    Date: 2009 May 08, 15:33 -0700
    Anabasis wrote:
    On May 8, 12:26 pm, Lu Abel <lu...{at}abelhome.net> wrote:
      
    I hope, for many reasons, that the EU solves its difficulties with
    creating the Galileo system.   But as yet another space-based
    positioning system transmitting on the same frequencies as GPS, if
    nature (as opposed to a political act) takes GPS down, it will also take
    down Galileo.
    
    I think the greater risk is the political act, but you are right
    there.  The trouble is that some sort of ionic burst/solar flare from
    the sun that would lay to waste the GPS system would probably cause
    massive radio blackouts throughout the radio spectrum.  This would
    cripple any land based radio navigation as well.
    Solar flares will play hob with the ionosphere, hampering long-range radio communications, as well as increasing background noise and therefore reducing the signal-to-noise ratio of signals received from satellites.

    Loran runs on 100KHz groundwaves.   Solar activity would not affect this end of the spectrum, which is why the US Federal Radionavigation Plan touted eLoran as an alternative to GPS.

    --~--~---------~--~----~------------~-------~--~----~
    Navigation List archive: www.fer3.com/arc
    To post, email 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