Wavefront reconstruction for a natural guide star ground layer adaptive optics system on the Giant Magellan Telescope

Marcos A. van Dam, Antonin H. Bouchez, Rodolphe Conan, Brian A. McLeod

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    1 Citation (Scopus)

    Abstract

    In this paper, we present a wavefront reconstruction paradigm for NGS GLAO systems. The conventional approach to reconstructing the wavefront for LGS GLAO systems is to have a number of LGSs in a ring outside the science field and simply average the individual wavefronts. This approach is not well-suited to NGS GLAO because the stars have an irregular distribution and varying magnitudes. In this paper, we derive covariance matrices for the wavefronts in different directions and the measurement noise. Using these covariance matrices, we are able to find the minimum-variance reconstructor and estimate the residual wavefront as a function of location in the field. This can be used to determine which guide stars produce the best correction. End-to-end simulations in YAO are run to estimate the expected performance of the NGS GLAO system for the Giant Magellan Telescope. We find that there is essentially full sky coverage.

    Original languageEnglish
    Title of host publication3rd AO4ELT Conference - Adaptive Optics for Extremely Large Telescopes
    PublisherINAF - Osservatorio Astrofisico di Arcetri Largo Enrico Fermi
    ISBN (Print)9788890887604
    DOIs
    Publication statusPublished - 2013
    Event3rd Conference on Adaptive Optics for Extremely Large Telescopes, AO4ELT 2013 - Florence, Italy
    Duration: 26 May 201331 May 2013

    Publication series

    Name3rd AO4ELT Conference - Adaptive Optics for Extremely Large Telescopes

    Conference

    Conference3rd Conference on Adaptive Optics for Extremely Large Telescopes, AO4ELT 2013
    Country/TerritoryItaly
    CityFlorence
    Period26/05/1331/05/13

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