→ New Tech Targets GPS’s Navigation Supremacy
https://spectrum.ieee.org/optical-gyroscopes-on-chip
“[T]hey created a solid-state #gyroscope small enough to fit on a grain of rice. Like the optical gyroscopes that appeared before it, this gyroscope leveraged the #Sagnac effect”
“[T]his method does not rely on external signals, it is immune to electromagnetic interference, vibration, and cyberattacks via an open communication channel—making it an ideal solution for applications where #GPS is unreliable or completely denied”