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    Re: Visual satellite position fix
    From: Richard Easton
    Date: 2013 Aug 12, 14:25 -0700

    The 1955 Project Vanguard proposal listed navigation as a beneficial use of satellites. It stated that, "It would also be possible to determine the absolute longitudes and latitudes by observation of the satellite. Such observations would also yield the height of the observer above the center of the earth."
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