Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pasp..117..401r&link_type=abstract
The Publications of the Astronomical Society of the Pacific, Volume 117, Issue 830, pp. 401-410.
Astronomy and Astrophysics
Astronomy
11
Subject Headings: Atmospheric Effects
Scientific paper
Seeing data from 41 campaigns at 23 sites ranging in altitude from 1130 to 5150 m and elevations between 1 and 30 m above grade are used to calibrate and test a simple seeing model that only involves altitude and elevation. The model is consistent with in situ studies of optical turbulence, reproducing measured median seeing values with a dispersion of 0.096", while at multiple-campaign sites the actual data show a dispersion of 0.092". Surface-layer turbulence is the characteristic that varies the most between campaigns and sites and is generally the dominant contribution to seeing at low elevations, the resulting image blur decreasing with a scale height of 3.5 m. The seeing distributions are lognormal at all sites, with quartile-to-median ratios of 4/5 and 5/4.
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