An Improved Clutter Suppression Method for Weather Radars Using Multiple Pulse Repetition Time Technique

Figure 5

Radial velocity estimated from simulated and radar data sampled at ((a), (d), (g)) unique PRT of 1050 , ((b), (e), (h)) 2-PRT (1050 and 1200 ), and ((c), (f), (i)) 4-PRT (1050, 1200, 1500, and 1950 ) with SNR = 40 dB and different CSR scenarios: (a)–(c) CSR = 10 dB, (d)–(f) CSR = 20 dB, and (g)–(i) CSR = 30 dB. Note that the data are shown for 30 km × 60° space. The range and azimuth resolutions are 150 m and 1°, respectively. The corresponding unambiguous velocities are 7.14 m/s for unique PRT and 50 m/s for the other two schemes. The pulse pair processing (PPP) method is used in (a), (d), and (g). The PTDM is used in the others.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)

(i)