Astronomy and Astrophysics – Astronomy
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pasp..118..756t&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 118, Issue 843, pp. 756-764.
Astronomy and Astrophysics
Astronomy
1
Atmospheric Effects, Site Testing, Turbulence
Scientific paper
From the statistical study of 162 profiles of meteorological balloons equipped with microthermal sensors, a new model is proposed, linking the temperature fluctuation structure constant (C2T) to the gradient of the mean potential temperature. This model is able to provide a vertical profile of the optical turbulence index (C2N) from a temperature profile, with a 1 km vertical resolution. Compared with the Vernin-Tatarski model and the median C2N profile, it gives better results as a profiler and seeing estimator. Within a large seeing distribution between 0.3" and 3", 58% are estimated with less than 30% of error. Our model fits well this wide median seeing range, which extends from 0.7" at Cerro Pachón to 2.9" at the South Pole.
Trinquet Herve
Vernin Jean
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