28 July 2010 Laser guide star return flux simulations based on observed sodium density profiles
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Abstract
We extend previous sodium LGS models by integrating the return flux across the mesosphere, taking into account variable mesospheric gas density, temperature, and local sodium density. This method allows us to produce accurate predictions of the actual return flux on the ground, relevant for determining the performance of adaptive-opticsassisted instruments. We find that the flux distribution across the sky depends strongly on geographic location and laser parameters. Almost independent of location, future sodium LGS will be about three times brighter at zenith than at the observing horizon.
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Ronald Holzlöhner, Simon M. Rochester, Thomas Pfrommer, Domenico Bonaccini Calia, Dmitry Budker, James M. Higbie, Wolfgang Hackenberg, "Laser guide star return flux simulations based on observed sodium density profiles", Proc. SPIE 7736, Adaptive Optics Systems II, 77360V (28 July 2010); doi: 10.1117/12.856721; https://doi.org/10.1117/12.856721
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