gps - GPS Elements of GPS Swarm of satellites orbiting the...

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GPS
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Elements of GPS Swarm of satellites orbiting the earth Each one has several atomic clocks on board Each satellite broadcasts the local time and where it is GPS receiver gets the signals from several satellites, compares to its local time, and figures out position
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Satellites Things that orbit something else The Moon Other moons around other planets First man-made satellite: Sputnik 1 (1957) QuickTimeª and a decompressor are needed to see this picture. QuickTimeª and a decompressor are needed to see this picture. QuickTimeª and a decompressor are needed to see this picture.
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Orbits Low earth orbit 27,000 km/h 160-2000 km above the earth 90 minute orbit Geosynchronous 11,000 km/h 36,000 km above the earth 24 hr orbit QuickTimeª and a decompressor are needed to see this picture.
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Satellite Typically a multi- step process: Get off the ground Circularize the orbit to avoid hitting the earth Fire rockets to move further out Fire rockets to get in final orbit QuickTimeª and a decompressor are needed to see this picture. From www.satcom.co.uk/
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gps - GPS Elements of GPS Swarm of satellites orbiting the...

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