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Satellite Navigation with GPS
Mini Atomic Clocks Promise Greater Accuracy and Alt-PNT Independence - Inside GNSS - Global Navigation Satellite Systems Engineering, Policy, and Design
NASA's Deep Space-Bound Atomic Clock Has Activated | Space
Atomic clock - Wikipedia
New miniature atomic clock aids positioning in difficult environments - GPS World
NASA to test new atomic clock
The Satellite Clock | GEOG 862: GPS and GNSS for Geospatial Professionals
The Deep Space Atomic Clock just passed its first test | Science News
ESA - How the Galileo atomic clocks work
Should I Use a GPSDO or Atomic Clock in my Satellite Application?