SAM Closes the loop

SAM Closes the loop
       
April 16, 2011. The loop was closed on the laser guide star on April 15.
Next night, the improvement of the image quality in closed-loop was documented by images of bright stars. Side-by-side comparison of PSFs in the green and red are shown in the image, with FWHM indicated. 
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April 16, 2011. The loop was closed on the laser guide star on April 15.