Na layer variability and implications for LGS adaptive optics: determination, analysis and impact on AO correction

Katharine J. Jones

doi:10.1117/12.858622

12 August 2010 Na layer variability and implications for LGS adaptive optics: determination, analysis and impact on AO correction

Katharine J. Jones

Author Affiliations +

Proceedings Volume 7816, Advanced Wavefront Control: Methods, Devices, and Applications VIII; 78160I (2010) https://doi.org/10.1117/12.858622
Event: SPIE Optical Engineering + Applications, 2010, San Diego, California, United States

Abstract

The concept of the laser guide star was proposed by Foy and Labeyrie, 1985. The Laser Guide Stars (LGS) depend on the abundance and distribution of sodium in the mesosphere. The mesopheric sodium often appears to consist of more than one layer, each of which exhibits time variation in density and altitude. The non-zero thickness and finite range of the layers results in elongation of the LGS defocus on extremely large telescopes such as TMT and VLT. Na variability will be examined for determination, analysis and impact on Adaptive Optics aberration correction.

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Katharine J. Jones "Na layer variability and implications for LGS adaptive optics: determination, analysis and impact on AO correction", Proc. SPIE 7816, Advanced Wavefront Control: Methods, Devices, and Applications VIII, 78160I (12 August 2010); https://doi.org/10.1117/12.858622

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