Rayleigh Scattering and Laser Spot Elongation Problems at ALFA View Full Text


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Article Info

DATE

2000-04

AUTHORS

E. Viard, F. Delplancke, N. Hubin, N. Ageorges, R. Davies

ABSTRACT

This article 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 ageneral AO simulation, provide the sensor sub-apertureimages. It is shown that the centroid measurement accuracyis affected by these phenomena. The simulation was made both for the ALFA system and for the VLT Nasmyth Adaptive Optics System (NAOS). More... »

PAGES

123-133

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1008117126814

DOI

http://dx.doi.org/10.1023/a:1008117126814

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1029469017


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