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    Re: Visual satellite position fix
    From: Richard B. Langley
    Date: 2013 Aug 13, 09:57 -0300

    Here are a few pages on early satellite-based positioning from the venerable 
    Guide to GPS Positioning, which I helped to write over 25 years ago. The full 
    book can be downloaded here:
    http://www2.unb.ca/gge/Pubs/LN58.pdf (70 MB; searchable).
    -- Richard Langley
    
    
    
    
    On Monday, August 12, 2013,224, at 11:50 PM, Richard Easton wrote:
    
    > One caveat - Vanguard was using radio waves to detect the satellites 
    (through Minitrack). Alas, they're planning to shut down the Space Fence.
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    | Richard B. Langley                            E-mail: lang@unb.ca         |
    | Geodetic Research Laboratory                  Web: http://www.unb.ca/GGE/ |
    | Dept. of Geodesy and Geomatics Engineering    Phone:    +1 506 453-5142   |
    | University of New Brunswick                   Fax:      +1 506 453-4943   |
    | Fredericton, N.B., Canada  E3B 5A3                                        |
    |        Fredericton?  Where's that?  See: http://www.fredericton.ca/       |
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