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Adaptive Optics WFS

ALTAIR, the adaptive optics system of the Gemini North telescope, can be used with either a bright natural guide star or a laser guide star.   When the laser is used a nearby natural guide star is also required for tip/tilt and focus corrections.

GeMS, the multi-conjugate adaptive optics (MCAO) system at Gemini South, uses a combination of reflected laser beams and nearby guide stars.