vvp15 vvp1 vvp2 vvp3 vvp4 vvp5 vvp6 vvp7 vvp8 vvp9 vvp10 vvp11 vvp12 vvp13 vvp14 vvp15 SRI (Surface Rainfall Intensity) An estimate of rainfall intensity associated with different echoes. HWind (Horizontal Wind) Shows wind flow at a specific altitude. PPI (Plan Position Indicator) Gives a representation of the height to which the top of the clouds extend. MAX (Maximum) Shows a 2 dimensional (2D) flow for the horizontal and vertical profile of the clouds. EHT (Echo Height Top) Gives a representation of the height to which the top of the clouds extend.