Monitoring of atmospheric sodium: new method to get the telluric spectrum and influence of the water lines in the performances of LGS

Sergio Chueca Urzay; Jesus Jimenez Fuensalida

doi:10.1117/12.390335

7 July 2000 Monitoring of atmospheric sodium: new method to get the telluric spectrum and influence of the water lines in the performances of LGS

Sergio Chueca Urzay, Jesus Jimenez Fuensalida

Author Affiliations +

Proceedings Volume 4007, Adaptive Optical Systems Technology; (2000) https://doi.org/10.1117/12.390335
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

Abstract

The monitoring of the column density of atmospheric sodium could be crucial for the efficiency of LGS systems. However, its detection is affected by the presence of water lines around the sodium doublet lines; this is really dramatic in the D₂ line. We have developed a new method to detect the D₂ sodium telluric line, obtaining previously the solar spectrum clean of telluric contamination. This method does not need any theoretical supposition on the solar line profile. We analyze the influence of the water lines in the detection of the D₂ line and discuss the effects on the efficiency of LGSs.

Citation Download Citation

Sergio Chueca Urzay and Jesus Jimenez Fuensalida "Monitoring of atmospheric sodium: new method to get the telluric spectrum and influence of the water lines in the performances of LGS", Proc. SPIE 4007, Adaptive Optical Systems Technology, (7 July 2000); https://doi.org/10.1117/12.390335

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