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  • 1
    Electronic Resource
    Electronic Resource
    Rayleigh Scattering and Laser Spot Elongation Problems at ALFA (2000)
    Springer
    Experimental astronomy 10 (2000), S. 123-133 
    Details
    ISSN: 1572-9508
    Keywords: adaptive optics ; laser guide star ; Rayleigh scattering ; spot elongation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 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).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008117126814
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