Figure 4 . PPI at 2° elevation of (a)unfolded φdp, (b)filtered φdp and (c)estimated Kdp. Blue line in (b, c) represents 281° azimuth. (d) Variation of φdp(blue) and Kdp(red) along 281° azimuth. DATA: 18:54:12 IST, 13-may-2018.