History of GLONASS - Wikipedia
The Interoperable Global Navigation Satellite Systems Space Service Volume
ESA - GLONASS
Satellite navigation - Wikipedia
Test your Android device's satellite navigation performance
GLONASS | NovAtel
GLONASS Satellites and Signals | GEOG 862: GPS and GNSS for Geospatial Professionals
What on Earth is the Global Positioning System? > U.S. Department of Defense > Story
GLONASS Future and Evolutions - Navipedia
Study maps 'extensive Russian GPS spoofing' - BBC News
Russia to 'restrict' US-run GPS satellites - BBC News
Robust security protection for GNSS satellite signals - Thales Aerospace BlogThales Aerospace Blog
China's version of GPS now has more satellites than US original - Nikkei Asia
GPS.gov: Space Segment
iPhone 8, 8 Plus, and X Support the Galileo Satellite System for Better GPS - MacRumors
GNSS
China Launches Beidou, Its Own Version of GPS - IEEE Spectrum
Satellite Navigation - GPS - How It Works | Federal Aviation Administration
Satellite jamming 'normal' by militaries during conflict, not peacetime: State Dept. official - Breaking Defense
What are Global Navigation Satellite Systems? | NovAtel
What Happens If GPS Fails? - The Atlantic
Op-ed | Russian threats a reminder of the need to protect GPS - SpaceNews
