Fig. 6. Time evolution of averaged velocities (A) and their standard deviations (B)
for the cells located in the camera field of view. Absolute projected velocity
Vp, vertical velocity Vz and
horizontal velocity Vx. Diamonds with error bars
correspond to the instant values
Vx
r,b,
Vz
r,b,
Vp
r,b. Solid lines correspond to
averaged values of Vp, Vz and
Vx in A and to their standard deviations in B, obtained
using an equation similar to Equation 5.