Calculation of radial and tangential component of wind

I have U and V wind over a specific domain for 5 timesteps.

How do I calculate radial and tangential wind component out of U and V winds.

Answer 1

[Image Analyst]

Wouldn't it just be the usual trig formulas? Untested code:

rComponent = sqrt(dU.^2+dV.^2);
angularComponent = atand2d(dV, dU);

Where dU and dV are the instantaneous/delta U and V from the prior image.

Or you can use optical flow perhaps.