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Validation of tomographic laser guide star uplink tip-tilt determination with CANARY
- Source :
- 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⟩
- Publication Year :
- 2016
- Publisher :
- SPIE, 2016.
-
Abstract
- 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.
- Subjects :
- 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
Subjects
Details
- ISSN :
- 0277786X
- Database :
- OpenAIRE
- Journal :
- Adaptive Optics Systems V
- Accession number :
- edsair.doi.dedup.....2a92afae7c35207a05fda6bd12879ee5