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Proceedings Paper

Na layer variability and implications for LGS adaptive optics: determination, analysis and impact on AO correction
Author(s): Katharine J. Jones
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Paper 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.

Paper Details

Date Published: 12 August 2010
PDF: 8 pages
Proc. SPIE 7816, Advanced Wavefront Control: Methods, Devices, and Applications VIII, 78160I (12 August 2010); doi: 10.1117/12.858622
Show Author Affiliations
Katharine J. Jones, WBAO (United States)


Published in SPIE Proceedings Vol. 7816:
Advanced Wavefront Control: Methods, Devices, and Applications VIII
David C. Dayton; Troy A. Rhoadarmer; Darryl J. Sanchez, Editor(s)

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