Re: GPS on the ISS?

From: Tony Beresford (
Date: Mon Mar 03 2003 - 08:47:37 EST

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    At 17:59 3/03/03, Tom Wagner wrote:
    >Anyway, one of the shots showed two astronauts handling a paper map while
    >trying to figure out what part of the earth they were over. I suppose they
    >wouldn't have much time to make a determination. Now the map thing got me
    >thinking. Would it be possible to use a GPS receiver in the ISS? Probably
    >not I suppose.
    Lots of the recently launched satellites have GPS receivers installed
    Tom, so there is no problem with using them in orbit. In Fact an Audtralian 
    microsatellite called Fedsat has one. Not so much to give position but to
    use the phase difference to measure electrons between it and the GPS constellation. Thebn when Fedsat makes a pass over a GPS base station the difference in
    measures shows the total electron content up to Fedsat's orbit.
    There is the question of installing the antenna externally since I assume the ISS structure is a conductor and rather impervious to radio signals.
    Tony Beresford
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