Northrop Grumman to shrink size of GPS satellite electronics with signal-generation upgrade | Military & Aerospace Electronics
Air Force set to launch next GPS IIF satellite
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GPS Block II R
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GPS III Satellite Launches with BAE Systems RAD750 Single Board Computers | Business Wire
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Russia's GPS satellite system | Shanghai Daily
China's version of GPS now has more satellites than US original - Nikkei Asia
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GPS signals - Wikipedia
Why the Pentagon Got Just One Bid to Build Next-Generation GPS Satellites - WSJ
GPS Exhibit
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Air Force set to launch next GPS IIF satellite
File:Global Positioning System satellite.jpg - Wikimedia Commons
Harris Corporation Delivers Fifth GPS III Satellite Navigation Payload | Business Wire
