Why are the GPS constellation satellites in such a high orbit? - Space Exploration Stack Exchange
The Global Positioning System: Global Positioning Tutorial
Precise Orbit Determination - Navipedia
First GPS III satellite successfully launched > United States Air Force Academy > Air Force Academy News
GPS Block IIF – Spacecraft & Satellites
GPS Constellation | Time and Navigation
The Sky's The Limit - The Global Positioning System (GPS)101 <<Safer,Smarter,Confident Pilots>> #SmartPilotLikeToLearn The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States ...
Global Positioning System - Wikipedia
Satellite orbit heights and how they impact satellite communication