 speed_and_angle_along_fitted_traj.txt. Note that the angle is the actual_candidate_angle; i.e, angle between c0-c1 and c0-cc.
 The angle is in degrees from the horizontal positive x axis.

frame   traj#      tt    Centroid    x(cc)     y(cc)    speed@tc     angle         Vx          Vy   
                         no. (cc)  (pixels)  (pixels)     (mps)    (degrees)      (mps)       (mps) 
