GPS.gov: Space Segment
The Science Behind the New GPS Satellites | Science Times
What Causes GPS Signal Loss on Satellites like Swarm? - Eos
GPS Satellites | Lockheed Martin
Satellite Navigation - GPS - How It Works | Federal Aviation Administration
Scientists create their own GPS by spying on internet satellites | Science | AAAS
China's version of GPS now has more satellites than US original - Nikkei Asia
Satellite navigation - Wikipedia
Brief History of GPS | The Aerospace Corporation
The Global Positioning System: Global Positioning Tutorial
First GPS IIF satellite on station > Schriever Space Force Base (Archived) > Article Display
Feb. 14, 1989: GPS Enters Orbit | WIRED
GPS error caused '12 hours of problems' for companies - BBC News
GPS | Definition, Types, Uses, & Facts | Britannica
Next-Gen GPS Satellites Get Ground-Control Modernization - Breaking Defense
How GPS Found Its Way - Science Friday
Navstar: GPS Satellite Network | Space
What Happens If GPS Fails? - The Atlantic
List of GPS satellites - Wikipedia
The Failed Attempt to Destroy GPS - The Atlantic
Satellite Navigation - Global Positioning System (GPS) | Federal Aviation Administration
GPS Block III: a new generation of GPS satellites now included in the EGNOS solution | EGNOS User Support
