the clock problem

• Use two modalities: RF for control (very fast), sound for measurement (slow)

• We can simulate instantaneous info flow because it is almost instant relative to what we’re measuring

  • Speed of sound: 344 m/s
  • Speed of light: 300M m/s (30m = 0.1 usec)
  • 0.1 usec * 344m/s = 0.000 034 4 m

• Like Pinpoint, subtract out fixed delays (empirically derived) to get flight time

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