Features of formation of sodium laser guide star in Russian observatories

L. A. Bolbasova; S. A. Ermakov; V. P. Lukin

doi:10.1117/12.2688685

17 October 2023 Features of formation of sodium laser guide star in Russian observatories

L. A. Bolbasova, S. A. Ermakov, V. P. Lukin

Proceedings Volume 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 127800G (2023) https://doi.org/10.1117/12.2688685
Event: XXIX International Symposium "Atmospheric and Ocean Optics, Atmospheric Physics", 2023, Moscow, Russian Federation

Abstract

The design of adaptive optics (AO) is largely determined by atmospheric conditions above the telescope site, such as optical turbulence and wind speed. Besides the requirements to laser for LGS formation are related to atmospheric parameters. In this case, the main goal is to provide a sufficient return photons flux from LGS for measurement by the wavefront sensor. The return flux from sodium laser guide star (LGS) is determined by the characteristics of the sodium layer, atmospheric transmission, geomagnetic field parameters, and the spot size of LGS in the mesosphere. The resonance fluorescence of sodium atoms in the mesosphere is affected by such atmospheric parameters, as temperature, wind, atmospheric density of molecules at height of LGS formation. The parameters listed above depend on location of telescope and have seasonal variations. The study discusses these characteristics for astronomical observatories in the Russian Federation located in middle latitudes.

Citation Download Citation

L. A. Bolbasova, S. A. Ermakov, and V. P. Lukin "Features of formation of sodium laser guide star in Russian observatories", Proc. SPIE 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 127800G (17 October 2023); https://doi.org/10.1117/12.2688685

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