Pulse train (slow-time view)

Unambiguous range & velocity vs PRF

Ru (km) vu (m/s) current PRF
Waveform (X-band, λ = 3 cm)
PRF1.0 kHz
Pulse width100 ns
PRI
1.0 ms
Duty cycle
0.01%
R_u
150 km
v_u
7.5 m/s
Invariant R_u · v_u
1125
km·m/s = cλ/8 (constant)
True range200 km