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Proceedings Paper

High-resolution mesospheric sodium observations for extremely large telescopes
Author(s): Thomas Pfrommer; Paul Hickson
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Paper Abstract

Variations in density structure and altitude of mesospheric sodium impact the performance of adaptive optics systems employing sodium laser guide stars. The associated wave-front errors grow as the square of the telescope aperture and will be very significant for the next generation of large-aperture ground-based optical/infrared telescopes. To support the adaptive optics program for the Thirty Meter Telescope and European Extremely Large Telescope, we are conducting a program of sodium monitoring using a high-resolution sodium lidar system on the 6-meter Large Zenith Telescope (LZT). Located at 49°N latitude, the LZT lidar system provides density profiles with spatial and temporal resolution sampling of 4.8 m and 20 ms. In this paper we report highlights of results obtained over two years of observations.

Paper Details

Date Published: 14 July 2010
PDF: 11 pages
Proc. SPIE 7736, Adaptive Optics Systems II, 773620 (14 July 2010); doi: 10.1117/12.857703
Show Author Affiliations
Thomas Pfrommer, The Univ. of British Columbia (Canada)
Paul Hickson, The Univ. of British Columbia (Canada)


Published in SPIE Proceedings Vol. 7736:
Adaptive Optics Systems II
Brent L. Ellerbroek; Michael Hart; Norbert Hubin; Peter L. Wizinowich, Editor(s)

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