We describe some of the effects of the atmosphere on images, including
selected relations based on the theory of atmospheric turbulence. The relations
given by this theory are not derived; for thorough discussions of the theory of
turbulence applied to optical astronomy the reader should consult the references
by Roddier (1981) and Coulman (1985). We consider the effects of turbulence
from the point of view of the time-averaged modulation transfer function (MTF)
of the atmosphere.
16.1.
EFFECTS OF ATMOSPHERIC TURBULENCE
The most notable effect of a turbulent atmosphere is a blurred image in the
foca
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