Assessment of the impact of meteorological conditions on pyrheliometer calibration
Solar Energy, 2018 Pyrheliometer calibration must be done following strict procedures in order to ensure the required robustness and accuracy. These procedures are described in the ISO 9059:1990 and ASTM E 816 – 15 international standards.
Stefan Wilbert
exaly +3 more sources
Comparison of aerosol optical depth from satellite (MODIS), sun photometer and broadband pyrheliometer ground-based observations in Cuba [PDF]
Atmospheric Measurement Techniques, 2018 In the present study, we report the first comparison between the aerosol optical depth (AOD) and Ångström exponent (AE) of the Moderate Resolution Imaging Spectroradiometer (MODIS) instruments on the Terra (AODt) and Aqua (AODa) satellites and those ...
J. C. Antuña-Marrero +8 more
doaj +3 more sources
On the Development of a Low Cost Pyrheliometer [PDF]
Journal of Solar Energy Engineering, 2010 A low cost pyrheliometer, based on a thermoelectric sensor, was developed at the Energy and Sustainability Center at the Florida State University. In addition, an inexpensive double-axis tracking device, capable of autonomous operation, enables the pyrheliometer to operate as a stand-alone system. Widely available off-the-shelf components were used and
Michael Gnos +2 more
semanticscholar +4 more sources
Some characteristics of the marvin pyrheliometer [PDF]
Journal of the Franklin Institute, 1918 University of Minnesota Ph.D. dissertation. May 1917. Major: Physics. Advisor: Dr. Stratton. 1 computer file (PDF); 29 pages.
P. D. Foote
semanticscholar +3 more sources
SOME CHARACTERISTICS OF THE EPPLEY PYRHELIOMETER
Monthly Weather Review, 1951 Abstract Tests were made of the effect of several variables on the performance of the Eppley pyrheliometer. The tests showed: (1) How the output increased with decreasing ambient temperature; (2) how output varied with angle of incidence of collimated radiation; (3) that output decreased about 5 percent when receiver was exposed in the vertical plane ...
T. H. Macdonald
exaly +3 more sources
Measuring DNI with a New Radiometer Based on an Optical Fiber and Photodiode [PDF]
SensorsA new cost-effective radiometer has been designed, built, and tested to measure direct normal solar irradiance (DNI). The proposed instrument for solar irradiance measurement is based on an optical fiber as the light beam collector, a semiconductor ...
Alejandro Carballar +4 more
doaj +2 more sources
Optical reflectance of pyrheliometer absorption cavities: progress toward SI-traceable measurements of solar irradiance. [PDF]
Appl Opt, 2016 We have accurately determined the absorptance of three pyrheliometer cavities at 532 nm by measuring the residual reflectance using an angle-resolved bidirectional reflectometer.
Patrick HJ +4 more
europepmc +2 more sources
The controversial early brightening in the first half of 20th century: A contribution from pyrheliometer measurements in Madrid (Spain) [PDF]
Global and Planetary Change, 2014 A long-term decrease in downward surface solar radiation from the 1950s to the 1980s (“global dimming”) followed by a multi-decadal increase up to the present (“brightening”) has been detected in many regions worldwide. In addition, some researchers have
Manuel Anton
exaly +2 more sources
A NEW FORM OF THERMOELECTRIC RECORDING PYRHELIOMETER
Monthly Weather Review, 1923 SYNOPSISA thermopile consisting of 50 couples is made from 6Au-40Pd with 90Pt-10Rh wire 0.0016 inch in diameter, by electrically fusing the junctions. Alternate junctions are attached to, but electrically insulated from, two thin concentric copper rings. The inner ring has its upper surface painted black; the outer ring, white.
Herbert H. Kimball, Hermann E. Hobbs
openaire +2 more sources