Gemini Preprint #70

Tilt anisoplanatism and PSF retrieval in LGS MCAO using a predictive controller

R. Flicker and F. Rigaut
Gemini Observatory Northern Operations Center, 670 N. A'ohoku Place, Hilo HI 96720


It is shown how Strehl ratio degradation due to tilt anisoplanatism in laser guide star supported multi-conjugated adaptive optics systems can be predicted by analytical models. Long exposure PSFs are retrieved from the model, and the advantage of implementing a predictive temporal controller to compensate for loop delay is demonstrated.

To appear in the proceedings of "Beyond Conventional Adaptive Optics".

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Ruth A. Kneale / / July 12, 2001

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