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High-resolution mesospheric sodium observations for extremely large telescopes.

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Title: High-resolution mesospheric sodium observations for extremely large telescopes.
Author: Pfrommer, Thomas; Hickson, Paul
Issue Date: 2010
Publicly Available in cIRcle 2011-09-19
Publisher Society of Photo-Optical Instrumentation Engineers
Citation: Pfrommer, Thomas; Hickson, Paul. High-resolution mesospheric sodium observations for extremely large telescopes. Adaptive Optics Systems II, edited by Brent L. Ellerbroek, Michael Hart, Norbert Hubin, Peter L. Wizinowich. Proceedings of SPIE Volume 7736, 773620, 2010. http://dx.doi.org/10.1117/12.857703
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. Copyright 2010 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Affiliation: Physics and Astronomy, Dept of
URI: http://hdl.handle.net/2429/37463
Peer Review Status: Reviewed
Scholarly Level: Faculty

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