76 measurement sequences were done on a dummy mirror inside the
rotating enclosure of the NTT at La Silla.
The table gives the azimuth
angle with respect to the wind direction,
the zenith angle
, the position of the wind screen
(d - down, u - up), the status of the flaps (o - open, c - closed),
the average external wind speed
in m/s,
the average
of the rms
of the pressure variations
over the sensors in Pa (after quadratic subtraction of the noise
of 1.5 Pa), and the rms
of the wavefront
aberration computed from the pressure distributions, scaled to the size of the VLT mirror (8.2-m).
NTT
NTT