Round 1/6Score 0
Sonar Ranger
Set a capture window for a returning pulse and solve Doppler shift.
Challenge
Live model
Ultrasound echo timing uses the complete out-and-back travel time.
The physics
Echo range: d = vt/2, air speed 343 m/s, water speed 1480 m/s. For a stationary observer and approaching source: f′ = fv/(v − uₛ). Uniform speed and point reflector assumed.