VADs (Velocity Azimuth Display)

At a given height (h), then the radial velocity is:

For a uniform flow field and assume V_w approximately = 0 then

Have two unknowns (U,V), but one equation….

But, if you sample at two different points in your scan;

(1)

(2)

So, two estimates of V_r at two different points around the cone will give U,V

Actually sample around the entire cone, so you have an overdetermined system for finding U,V