USAF's Next-Gen GPS Satellites Will Be a Huge Upgrade...Eventually
What's The Differences Between the 5 GNSS Constellations?
USA-213 - Wikipedia
Satellite Navigation - GPS - Space Segment | Federal Aviation Administration
US Military GPS - Army Technology
Global Positioning System | NASA
Brief History of GPS | The Aerospace Corporation
A short history of GPS development > Schriever Space Force Base (Archived) > Article Display
GPS.gov: Space Segment
GPS | Definition, Types, Uses, & Facts | Britannica
America advances GPS with new satellites | ShareAmerica
GPS-2 (Navstar-2) - Gunter's Space Page
Top Suppliers of Global Positioning Systems (GPS) in the US and Canada
USA-203 - Wikipedia
KSP History Part 168 - USA-35 (The first operational GPS Satellite) : r/KerbalSpaceProgram
Satellite Navigation - Global Positioning System (GPS) | Federal Aviation Administration
China's Rival to GPS Navigation Carries Big Risks
Spaceflight Now | Delta Launch Report | Shepherding a new era of GPS satellites to orbit
Global Positioning System > United States Space Force > Fact Sheets
List of GPS satellites - Wikipedia
What on Earth is the Global Positioning System? > U.S. Department of Defense > Story
USA: NOAA satellites help us prepare for severe weather | PreventionWeb
