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Improving LGS Sky Coverage at Gemini North

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Abstract

We report on work being done to operate the GN Altair LGS AO system using PWFS2 to track (i.e. TT correction) with a guide star at 6′-7′ from the LGS target as opposed to an NGS TT star within the Altair FoV (25″).

© 2011 Optical Society of America

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