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Publication
Site testing in winter at Dome C

Aristidi, E. et al., 2005, SF2A-2005: Semaine de l'Astrophysique Francaise, 45 | View on ADS (2005sf2a.conf...45A)

Abstract

We present site testing results obtained in night-time during the polar winter at Dome C. These results were collected during the first Concordia winterover by A. Agabi. They are based upon seeing and isoplanatic angle monitoring, as well as in-situ balloon measurements of the refractive index structure constant profiles C_n²(h). Atmosphere is divided into two regions: (i) a 36 m high surface layer responsible of 87% of the turbulence and (ii) a very stable free atmosphere above with a median seeing of 0.36±0.19 arcsec at an elevation of h=30m. The median seeing measured with a DIMM placed on top of a 8.5 m high tower is 1.3±0.8 arcsec.