Image Quality (Mauna Kea):
-Percentage of Photometric Conditions: 62% of usable time
-Median Site Seeing: 0.43 arcsec FWHM* at 0.55 microns (Optical/Visual radiation)
-20% Percentile Site Seeing: 0.28 arcsec FWHM* at 0.55 microns
-Predicted Image Quality with Adaptive Optics: <0.07 arcsec FWHM* over a
1 arcminute diameter field at 2.2 microns (near infrared).
*FWHM – "Full Width Half Max" is the angular diameter of a star image at 50% of the maximum brightness (intensity).