Honeywell demonstrates military-grade alternative navigation tech - GPS World
DARPA Pursuing Global Positioning System Alternatives
Defense Department Moves to Augment GPS with Alternatives | FedTech Magazine
Honeywell pushes development of alternatives to GPS | News | Flight Global
Alternative Navigation Systems
Takeaways from the DOT study of GPS alternatives - NextNav
Building an Alternative to GPS - IEEE Spectrum
Explainer: NavIC, India's home-grown alternative to the GPS navigation system | Reuters
The Top 6 Verizon Connect Alternatives Available on the Mark | GPSWOX
Alternative to GPS: How to Get Better Accuracy with Images - Mosaic51
What is the GPS Clock? | GPS Timing | TimeTools Ltd
Sen. King Urges Top General to Make GPS Alternatives a “High Priority” - RNTF
US Air Force Awards Northrop Grumman GPS III Space Vehicle Alternatives Program Study Contract | Northrop Grumman
GPS Alternatives: DOD is Developing Navigation Systems but is Not Measuring Overall Progress | U.S. GAO
5 GPS Alternatives You Should Know | Beebom
DOD Not Prioritizing Development of GPS Alternatives, GAO Says - Nextgov
Alternatives to GPS - GPS
US Department of Transportation Seeking Alternatives to Advanced Navigation GPS | Blogs | Altium
Honeywell Developing Multiple Options For GPS-denied Navigation | Aviation Week Network
The GPS wars have begun | TechCrunch
Developing an Alternative To GPS with a HackRF
Ground-based alternative to GPS achieves 10 cm accuracy – Physics World
5 Cheap GPS Alternatives | Fox Business
UK firm pitches alternative GPS - Telecoms.com
5 GPS Alternatives You Should Know | Beebom
An alternative to RFID and GPS trackers for supply chains - Kizy
 "NavIC, India's Home-Grown Alternative To The GPS Navigation System")