sunshine recorder

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sunshine recorder

[′sən‚shīn ri‚kȯrd·ər]
(engineering)
An instrument designed to record the duration of sunshine without regard to intensity at a given location; sunshine recorders may be classified in two groups according to the method by which the time scale is obtained: in one group the time scale is obtained from the motion of the sun in the manner of a sun dial, in the second group the time scale is supplied by a chronograph.
References in periodicals archive ?
Brooks, 1947: Sunshine recorders: A comparative study of the burning-glass and thermometric systems.
Jaenicke, 1984: Experimental verification of the determination of atmospheric turbidity from sunshine recorders. J.
One such instrument is the Campbell-Stokes sunshine recorder (Fig.
The daily bright sunshine measurements made by the Campbell-Stokes sunshine recorder since 1965 are available from NCDC; however, the roughly 75 years of daily sunshine data prior to 1965 had never been digitally archived.
Meanwhile a and b are fitted constant coefficients such that b represents the sensitivity of normalized global irradiance to normalized sunshine percentage, while a represents global irradiance under overcast conditions when direct radiation is below the burning threshold of the sunshine recorder (approximately 120 W [m.sup.-2]).
Monthly average daily sunshine hours (n) were measured by Campbell-Stokes sunshine recorders. Total dailyglobal solar radiations were measured by Kipp & Zonen (CM5) pyranometers and CC1 integrators in fifteen ground stations.
Bright sunshine hours are recorded by Campbell-Stokes type sunshine recorder. In this instrument the solar energy is concentrated by a special lens and it detects the sunshine if the energy of the beam is high enough to burn a special dark paper card.

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