Design and predicted performance of the GMT ground-layer adaptive optics mode

Phillip M. Hinz, Guido Brusa, Vidhya Vaitheeswaran, Tom McMahon, Tom Connors, Russell Knox, Antonin Bouchez, Manny Montoya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

12 Scopus citations


The Giant Magellan Telescope is planning to provide adaptive wavefront correction of the low layers (<1 km) of atmospheric turbulence in support of wide-field instrumentation. This ground-layer adaptive optics (GLAO) mode will use the adaptive secondary mirrors to provide improved image quality over approximately 7 arcminutes FOV. We present a comparison between the use of a sodium laser guide star asterism plus three tip-tilt natural guide stars versus natural guide stars only on the average seeing width improvement. The layout and components of both (laser beacon based and natural star only based) GLAO concepts are described and the impact and interaction with other GMT subsystems is analyzed.

Original languageEnglish (US)
Title of host publicationAdaptive Optics Systems III
StatePublished - Dec 1 2012
EventAdaptive Optics Systems III - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherAdaptive Optics Systems III


  • Adaptive optics
  • Extremely large telescopes
  • Laser guidestar
  • Tomography
  • Wavefront sensing

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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