ATACAMA WORKSHOP, June 15-17 2000


Local Seeing Effects	ATACAMA WORKSHOP, Ithaca NY M. Sarazin, June 15-17 2000, 13/14

Local Seeing Effects

ATACAMA WORKSHOP, Ithaca NY

M. Sarazin, June 15-17 2000, 13/14

MIRROR SEEING (I)

The warm mirror seeing varies slowly with the thickness of the convective layer: reduce height by 3 orders of magnitude to divide mirror seeing by 4, from 0.5 to 0.12 arcsec/K

When a mirror is warmer that the air in an undisturbed enclosure, a convective equilibrium (full cascade) is reached after 10-15mn. The limit on the convective cell size is set by the mirror diameter