How Atomic Clocks Actually Work: From Quantum Resonance to GPS
How atomic clocks actually work — cesium hyperfine transitions, optical lattice clocks, what makes them so accurate, and why GPS and the internet depend on them.
How GPS Actually Works: Trilateration, Atomic Clocks, and Relativity
How GPS actually works: trilateration from satellite ranging, atomic clocks, the 38 microsecond relativity correction, ionospheric error, and how your phone gets a sub-5-metre fix.