A short history of GPS development > Schriever Space Force Base > Article Display
Brief History of GPS | The Aerospace Corporation
GPS-3 (Navstar-3) - Gunter's Space Page
Satellite GPS Receivers - General Dynamics Mission Systems
Global Positioning System > United States Space Force > Fact Sheets
The need for a Deep Space GPS - Space Legal Issues
Satellite navigation - Wikipedia
GPS.gov: Space Segment
NASA Seeks Wider Use of GPS: Not From Space, but in Space - Via Satellite -
Feb. 14, 1989: GPS Enters Orbit | WIRED
A step toward making GPS more resilient to space weather
Protect GPS" High on Space Force To-Do List? - C4ISRNET - RNTF
How Does GPS Work? | NASA Space Place – NASA Science for Kids
Lunar GPS? NASA Knows How to Help Astronauts Navigate | Space
Cosmic GPS - Aerospace America
AFRL's little NTS-3 test satellite holds 100 possibilities to help secure or backup GPS - Breaking Defense
14. Space Segment | The Nature of Geographic Information
Space Integrated GPS/INS (SIGI)
DARPA to re-invent GPS navigation without the use of satellites - ExtremeTech
:quality(70)/cloudfront-us-east-1.images.arcpublishing.com/mco/77MDKBEUBZHBNIPA3GGNVKHP3Y.jpg "US Space Force completes upgrade to help protect GPS capabilities")
US Space Force completes upgrade to help protect GPS capabilities
Countering the Loss of Satellite Communications and GPS | The MITRE Corporation
Masten Space Systems to develop a GPS-like network for the moon | TechCrunch
Global Positioning System satellite achieves 20 years on-orbit > Air Force Space Command (Archived) > Article Display
Using GPS, NASA tests atomic clock navigation
High-Flying NASA Mission Sets New GPS World Record | Space
