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 OSA
J. C. Christou, "Improving LGS Sky Coverage at Gemini North," in Imaging and Applied Optics, OSA Technical Digest (CD) (Optical Society of America, 2011), paper AWA3.
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