Plot of the mechanical errors
for 18 complete rotations
For any measurement, the
position of the center of the array is estimated as the average of the 32 values of the
time-of-flight
ØDC component
ØSinusoidal component
ØRandom noise
The phase coherence is
compromised
above 1 kHz
above 1 kHz
The time of flight was obtained
by the maximum of the Hilbert’s transform of the impulse
responses
Mechanical problems