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The Stability of a Silver-Disk Pyrheliometer
Bulletin of the American Meteorological Society, 1944exaly +2 more sources
Copper disk pyrheliometer of high accuracy
Applied Optics, 1983A copper disk pyrheliometer has been designed and constructed that utilizes a new methodology to measure solar radiation. By operating the shutter of the instrument and measuring the heating and cooling rates of the sensor at the very moment when the sensor is at the same temperature, the solar radiation can be accurately determined with these rates ...
C K, Hsieh, X A, Wang
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Two simple and novel pyrheliometers
Solar Energy, 1997Two simple and novel pyrheliometers have been designed and constructed based on a new methodology to measure solar irradiance. They are respectively the double-sensor and the single-sensor methods. The sensor surface is made of heavily oxidized stainless steel foil, which is formed as a circular disk and thermally joined to a large stainless steel ring
S.X Cheng, H.P Hu, L Chen
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Static and Pickup Protection for Pyrheliometer Installations*
Bulletin of the American Meteorological Society, 1945exaly +2 more sources
Evaluating calibrations of normal incident pyrheliometers
SPIE Proceedings, 2010When an Eppley Normal Incident Pyrheliometer is calibrated against an Eppley Hickey Frieden Absolute Cavity Radiometer, the instrument systematically deviates from the absolute cavity readings. The reason for this deviation is not understood. Comparisons are made between one pyrheliometer and an absolute cavity radiometer on selected clear days over
Frank Vignola, Fuding Lin
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The use of the Burt phototube in an integrating pyrheliometer
Eos, Transactions American Geophysical Union, 1935The high voltage used with the phototube gives this apparatus an important advantage over the thermocouple or resistance‐thermometer in any device employing vacuum‐tubes and designed for automatically integrating or recording the total energy from the Sun and sky.
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A system for automatic operation of the Ångström pyrheliometer
Archiv für Meteorologie, Geophysik und Bioklimatologie Serie B, 1963A servo-operated system to provide automatic control of heater current in the Angstrom electrical compensation pyrheliometer is described. An improved method of measuring the heater current, together with specifications for the control unit, are also presented.
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Cloud Reflection Effects in Pyrheliometer Records*
Bulletin of the American Meteorological Society, 1946“Inordinately” high values of solar radiation, noted at a high altitude desert station, were found to be caused by reflection from lower surfaces of clouds. Descriptions of these reflective phenomena, with explanatory diagrams and illustrative curves, are here presented.
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