GPS.gov: Space Segment
Global Positioning System
How Does GPS Work? | NASA Space Place – NASA Science for Kids
GPS Provides the Reference for Precision Time & Frequency Products | EndRun Tech
Satellite Navigation - GPS - How It Works | Federal Aviation Administration
First GPS III satellite successfully launched > United States Air Force Academy > Air Force Academy News
U.S. Space Force buys three new GPS satellites from Lockheed Martin - SpaceNews
Feb. 14, 1989: GPS Enters Orbit | WIRED
GPS Block IIF - Wikipedia
Global Positioning System (GPS) IIF Military Satellite - Airforce Technology
Newest GPS satellite goes active – Spaceflight Now
Satellite Blocks | GEOG 862: GPS and GNSS for Geospatial Professionals
The Failed Attempt to Destroy GPS - The Atlantic
Satellite Navigation - Global Positioning System (GPS) | Federal Aviation Administration
New Air Force Satellites Launched To Improve GPS | TechCrunch
Brief History of GPS | The Aerospace Corporation
Global Positioning System > United States Space Force > Fact Sheets
SDA ponders signal, tech trade-offs for alternate GPS satellite payloads - Breaking Defense
What Is GPS? The Complete Guide to the Uses of GPS | Geotab
Satellite navigation - Wikipedia
What is GPS? | NASA
GPS Block III: a new generation of GPS satellites now included in the EGNOS solution | EGNOS User Support
What's The Differences Between the 5 GNSS Constellations?
