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Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2005

A site-testing campaign at the Calar Alto Observatory with GSM and DIMM instruments

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Abstract

The main atmospheric optical parameters have been measured at the Calar Alto Observatory simultaneously using the Generalized Seeing Monitor (GSM) and a Differential Image Motion Monitor (DIMM) during several nights in 2002 May. The temporal evolution of the seeing, the outer scale, the isoplanatic angle and the coherence time have been analysed. There is excellent agreement between the seeing measurements provided by the two instruments, particularly when the turbulence is slow. Indeed, the GSM measurements are corrected from the exposure time when the DIMM data were recorded for at least 5 ms. From almost three years of DIMM (at 5 m height above ground) data, a seeing of 0.92 arcsec with a standard deviation of 0.31 arcsec has been obtained for this site
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Dates and versions

hal-00416927 , version 1 (04-12-2020)

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A. Ziad, R. Gredel, Jonathan Aceituno, J. Borgnino, F. Hoyo, et al.. A site-testing campaign at the Calar Alto Observatory with GSM and DIMM instruments. Monthly Notices of the Royal Astronomical Society, 2005, 362 (2), pp.455-459. ⟨10.1111/j.1365-2966.2005.09299.x⟩. ⟨hal-00416927⟩
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