Hi all! So at the end all the measurements are done…
First we verified the settling time of the ASM for a reduced set of modes. Here there are some examples of the step responses (the slowest mode and the most overshooting one) and a resume of the general behavior in terms of settling time:
After that we checked the ASM ability of tracking turbulence. A turbulent-like sequence of commands is sent and in the meanwhile we record the shell position using internal metrology. Here is the tracking error as a function of number of mirror modes.
Icing on the cake, we tested the FastLink connection between the NAS and the ASM (WFS Frames Counter running…):
And now we can say: ok we are ready for the Sky!