Instrumentation for comparing night sky quality and atmospheric conditions of CTA site candidates

Abstract : Many atmospheric and climatic criteria have to be taken into account for the selection of a suitable site for the next generation of imaging air-shower Cherenkov telescopes, the "Cherenkov Telescope Array" CTA. Such data are not available with sufficient precision, thus a comparison of the proposed sites and final decision based on a comprehensive characterization is impossible. Identical cross-calibrated instruments have been developed which allow for precise comparison between sites, the cross-validation of existing data, and the ground-validation of satellite data. The site characterization work package of the CTA consortium opted to construct and deploy 9 copies of an autonomous multi-purpose weather sensor, incorporating an infrared cloud sensor, a newly developed sensor for measuring the light of the night sky, and an All-Sky-Camera, the whole referred to as Autonomous Tool for Measuring Observatory Site COnditions PrEcisely (ATMOSCOPE). We present here the hardware that was combined into the ATMOSCOPE and characterize its performance.
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Submitted on : Monday, October 12, 2015 - 10:26:51 AM
Last modification on : Thursday, January 18, 2018 - 2:28:50 AM

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  • HAL Id : in2p3-01214345, version 1
  • ARXIV : 1501.02156

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C. Fruck, M. Gaug, J.-P. Ernenwein, D. Mandát, T. Schweizer, et al.. Instrumentation for comparing night sky quality and atmospheric conditions of CTA site candidates. Journal of Instrumentation, IOP Publishing, 2015, 10, pp.P04012. ⟨in2p3-01214345⟩

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