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http://dx.doi.org/10.5303/JKAS.2012.45.1.19

MICROTHERMAL INSTRUMENT FOR MEASURING SURFACE LAYER SEEING  

Li, Xue-Bao (Yunnan Astronomical Observatory, Chinese Academy of Sciences)
Zheng, Yan-Fang (Yunnan Astronomical Observatory, Chinese Academy of Sciences)
Deng, Lin Hua (Yunnan Astronomical Observatory, Chinese Academy of Sciences)
Xu, Guang (Yunnan Astronomical Observatory, Chinese Academy of Sciences)
Publication Information
Journal of The Korean Astronomical Society / v.45, no.1, 2012 , pp. 19-24 More about this Journal
Abstract
Microthermal fluctuations are introduced by atmospheric turbulence very near the ground. In order to detect microthermal fluctuations at Fuxian Solar Observatory (FSO), a microthermal instrument has been developed. The microthermal instrument consists of a microthermal sensor, which is based on a Wheatstone bridge circuit and uses fine tungsten filaments as resistance temperature detectors, an associated signal processing unit, and a data collection, & communication subsystem. In this paper, after a brief introduction to surface layer seeing, we discuss the instrumentation behind the microthermal detector we have developed and then present the results obtained. The results of the evaluation indicate that the effect of the turbulent surface boundary layer to astronomical seeing would become sufficiently small when installing a telescope at a height of 16m or higher from the ground at FSO.
Keywords
Microthermal measurement; site testing; instrumentation;
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