Measured intensity in pupil plane when observing the dome of the Palomar observatory through the 5 m Hale telescope+SDC+Pharo. The blue circle represents the 1.5 m off-axis pupil that is selected in the first pupil plane in SDC. The green circle shows the position of the Lyot stop. The intensity pattern is the dome structure. The thin black horizontal and vertical lines are the spiders.
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