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Abstract Review
(Late Submission)
Corresponding Author |
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Authors |
Name | | Affiliation |
Glen Herriot |
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Herzberg Institute of Astrophysics |
Luc Gilles |
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Thirty Meter Telescope Project |
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Abstract |
Session | | 2 (Adaptive optics, interferometry, and other approaches to mitigate atmospheric optical turbulence.) |
Title | | 'Special issues in atmospheric monitoring and characterization for future extremely large telescopes' |
Abstract | | A variety of atmospheric parameters and characteristics become increasingly important considerations for adaptive optical (AO) systems on future extremely large telescopes (ELTs) with aperture diameters greater than approximately 20 to 30 meters. These include the turbulence outer scale (L0), which influences the stroke and bandwidth requirements for deformable mirrors and tip/tilt mirrors; the thickness, structure, and temporal variability of the mesospheric sodium layer, which have a strong impact upon the design and performance of laser guide star (LGS) AO systems; and the validity of the Taylor (or frozen flow) hypothesis, which determines the potential performance of predictive algorithms for tip/tilt and higher order wavefront control. In addition, the multi-LGS AO systems proposed for future ELTs provide an interesting opportunity for real-time SLODAR characterization of the atmospheric Cn^2 profile during astronomical observations. We describe these issues and present sample results obtained as part of the design and evaluation of AO systems for the Thirty Meter Telescope (TMT) project.
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