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L5 Civil Signal Successfully Launched

IIR-20(M) Satellite with L5 Civil Signal Successfully LaunchedMar 24, 2009GPS WorldA Lockheed Martin-built modernized Global Positioning System Block IIR (GPS IIR-M) satellite, equipped with an innovative payload that will provide an on-orbit demonst

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Basic concept of GPS

Basic concept of GPSA GPS receiver calculates its position by precisely timing the signals sent by the GPS satellites high above the Earth. Each satellite continually transmits messages containing the time the message was sent, precise orbital inform

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