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About: List of GPS satellites     Goto   Sponge   NotDistinct   Permalink

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As of 25 June 2022, 78 Global Positioning System navigation satellites have been built: 31 are launched and operational, 3 are unhealthy or in reserve, 41 are retired, 2 were lost during launch, and 1 prototype was never launched. The constellation requires a minimum of 24 operational satellites, and allows for up to 32; typically, 31 are operational at any one time. A GPS receiver needs four satellites to work out its position in three dimensions.