Rayleigh scattering and laser spot elongation problems at ALFA

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dc.creatorViard, E.
dc.creatorDelplancke, F.
dc.creatorHubin, N.
dc.creatorAgeorges, N.
dc.creatorDavies, R.
dc.date1999-11-05
dc.date.accessioned2026-07-07T02:34:15Z
dc.date.available2026-07-07T02:34:15Z
dc.descriptionThis paper describes the qualitative effects of LGS spot elongation and Rayleigh scattering on ALFA wavefront sensor images. An analytical model of Rayleigh scattering and a numerical model of laser plume generation at the altitude of the Na-layer were developed. These models, integrated into a general AO simulation, provide the sensor sub-aperture images. It is shown that the centroid measurement accuracy is affected by these phenomena. The simulation was made both for the ALFA system and for the VLT Nasmyth Adaptive Optics System (NAOS).
dc.description12 pages, accepted in Experimental Astronomy (special issue about ALFA). A version with full resolution images can be obtained from the ALFA webpages at http://www.mpia-hd.mpg.de/ALFA/
dc.identifierhttps://arxiv.org/abs/astro-ph/9911086
dc.identifierhttp://arxiv.org/abs/astro-ph/9911086
dc.identifierExper.Astron. 10 (2000) 123-133
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/15171
dc.subjectAstrophysics
dc.titleRayleigh scattering and laser spot elongation problems at ALFA
dc.typetext

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