AFSPC Milestone: First Block II GPS satellite launched > Air Force Space Command (Archived) > Article Display
GPS (Navstar) - Gunter's Space Page
GPS Satellites | Lockheed Martin
Satellite Navigation - Global Positioning System (GPS) | Federal Aviation Administration
Global Positioning System Satellite Achieves 20 Years On-Orbit > Los Angeles Air Force Base > Article Display
GPS Block IIF - Wikipedia
Gps Satellite Vector Art, Icons, and Graphics for Free Download
The Global Positioning System: Global Positioning Tutorial
Army ponders satellite partners for 'Lonestar' GPS interference warning system - Breaking Defense
Brief History of GPS | The Aerospace Corporation
Feb. 14, 1989: GPS Enters Orbit | WIRED
Satellite navigation - Wikipedia
GPS Satellites | Lockheed Martin
GPS Next-Generation Operational Control System | Raytheon Intelligence & Space
GPS.gov: Space Segment
How Does GPS Work? | Time and Navigation
What is GPS? | NASA
What Is GPS? The Complete Guide to the Uses of GPS | Geotab
GPS Block III: a new generation of GPS satellites now included in the EGNOS solution | EGNOS User Support
GPS Provides the Reference for Precision Time & Frequency Products | EndRun Tech
Satellite Navigation - GPS - How It Works | Federal Aviation Administration
