Journal article
Natural guide-star processing for wide-field laser-assisted AO systems
- Abstract:
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Sky-coverage in laser-assisted AO observations largely depends on the system's capability to guide on the faintest natural guide-stars possible. Here we give an up-to-date status of our natural guide-star processing tailored to the European-ELT's visible and near-infrared (0.47 to 2.45 μm) integral field spectrograph — Harmoni.
We tour the processing of both the isoplanatic and anisoplanatic tilt modes using the spatio-angular approach whereby the wavefront is estimated directly in the pupil plane avoiding a cumbersome explicit layered estimation on the 35-layer profiles we're currently using.
Taking the case of Harmoni, we cover the choice of wave-front sensors, the number and field location of guide-stars, the optimised algorithms to beat down angular anisoplanatism and the performance obtained with different temporal controllers under split high-order/low-order tomography or joint tomography. We consider both atmospheric and far greater telescope wind buffeting disturbances. In addition we provide the sky-coverage estimates thus obtained.
- Publication status:
- Published
- Peer review status:
- Reviewed (other)
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- Files:
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(Preview, Accepted manuscript, pdf, 1.3MB, Terms of use)
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- Publisher copy:
- 10.1117/12.2232918
Authors
+ French National Research Agency
More from this funder
- Grant:
- A*MIDEX project (no. ANR-11-IDEX-0001-02
- Publisher:
- Society of Photo-optical Instrumentation Engineers
- Journal:
- Adaptive Optics Systems V More from this journal
- Publication date:
- 2016-07-27
- DOI:
- Keywords:
- Pubs id:
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pubs:636620
- UUID:
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uuid:3dc31aee-07f8-4d99-b57e-51402a7ff0c0
- Local pid:
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pubs:636620
- Source identifiers:
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636620
- Deposit date:
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2016-08-01
Terms of use
- Copyright holder:
- Society of Photo-optical Instrumentation Engineers
- Copyright date:
- 2016
- Notes:
- © SPIE. Presented at Adaptive Optics Systems V (Edinburgh, United Kingdom: June 26, 2016). This is the accepted manuscript version of the article. The final version is available online from SPIE at: [10.1117/12.2232918]
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