Validation of tomographic laser guide star uplink tip-tilt determination with CANARY
| Autor: | James Osborn, Tim Morris, Gérard Rousset, Carine Morel, Eric Gendron, Richards M. Myers, Fabrice Vidal, Andrew P. Reeves, Alastair Basden |
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| Přispěvatelé: | Duke University [Durham], Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Haute résolution angulaire en astrophysique, Laboratoire d'études spatiales et d'instrumentation en astrophysique = Laboratory of Space Studies and Instrumentation in Astrophysics (LESIA), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) |
| Rok vydání: | 2016 |
| Předmět: |
Wavefront
Physics business.industry Astrophysics::Instrumentation and Methods for Astrophysics Laser 01 natural sciences law.invention 010309 optics Laser guide star Tilt (optics) Optics law 0103 physical sciences Telecommunications link Tomography Guide star [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] business Adaptive optics 010303 astronomy & astrophysics |
| Zdroj: | Proceedings of the SPIE Adaptive Optics Systems V Adaptive Optics Systems V, Jun 2016, Edinburgh, United Kingdom. pp.99091Y 1-7, ⟨10.1117/12.2232395⟩ |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2232395 |
| Popis: | International audience; Laser Guide Stars (LGS) have greatly increased the sky-coverage of Adaptive Optics (AO) systems. Due to the up-link turbulence experienced by LGSs, a Natural Guide Star (NGS) is still required, limiting sky-coverage. A method has recently been presented that promises to determine the LGS uplink tip-tilt in tomographic LGS AO systems by using the fact that each LGS Wave Front Sensor (WFS) in a tomographic AO system observes the uplink path of other LGSs. Such a technique has the potential to greatly increase the sky-coverage of Multi- Object, Laser Tomographic and Multi-Conjugate AO systems by allowed further off-axis NGS tip-tilt stars to be used for correction. Here we use an approach based on phase gradient covariance matrices to create on-sky capable tomographic reconstructors that account for some tip-tilt from LGS WFSs. We present analysis of open loop wave front sensor data from the CANARY Multi-Object AO demonstrator, providing early validation for the technique. |
| Databáze: | OpenAIRE |
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