GPS | Definition, Types, Uses, & Facts | Britannica
Satellite Navigation - Global Positioning System (GPS) | Federal Aviation Administration
How Do Satellites Keep Track Of Their Own Position?
History of GPS satellites and commercial GPS tracking | Geotab
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First GPS III satellite successfully launched > Air Force > Article Display
GPS III/IIIF | Lockheed Martin
The Global Positioning System: Global Positioning Tutorial
Global Positioning System > Space Operations Command (SpOC) > Display
What is a GPS Tracking Device and How Do They Work ?
GPS Block III: a new generation of GPS satellites now included in the EGNOS solution | EGNOS User Support
Scientists create their own GPS by spying on internet satellites | Science | AAAS
Global Positioning System satellite achieves 20 years on-orbit > Air Force Space Command (Archived) > Article Display
Boeing wins $329 million contract to support orbiting GPS satellites - SpaceNews