I
Ibrahim Reda
Researcher at National Renewable Energy Laboratory
Publications - 58
Citations - 1876
Ibrahim Reda is an academic researcher from National Renewable Energy Laboratory. The author has contributed to research in topics: Pyranometer & Irradiance. The author has an hindex of 14, co-authored 46 publications receiving 1702 citations.
Papers
More filters
Journal ArticleDOI
Solar position algorithm for solar radiation applications
Ibrahim Reda,Afshin Andreas +1 more
TL;DR: In this paper, a step-by-step procedure for implementing an algorithm to calculate the solar zenith and azimuth angles in the period from the year −2000 to 6000, with uncertainties of ± 0.0003°.
Journal ArticleDOI
Measurement of Broadband Diffuse Solar Irradiance Using Current Commercial Instrumentation with a Correction for Thermal Offset Errors
Ellsworth G. Dutton,Joseph J. Michalsky,Thomas Stoffel,Bruce W. Forgan,John R. Hickey,Donald W. Nelson,Timothy L. Alberta,Ibrahim Reda +7 more
TL;DR: In this paper, a data correction procedure that is intended to account for the offset caused by thermal IR exchange between the detector and filter domes in certain common diffuse pyranometers is developed and validated.
Journal ArticleDOI
Atmospheric longwave irradiance uncertainty: Pyrgeometers compared to an absolute sky-scanning radiometer, atmospheric emitted radiance interferometer, and radiative transfer model calculations
Rolf Philipona,Ellsworth G. Dutton,Tom Stoffel,J. J. Michalsky,Ibrahim Reda,A. Stifter,Peter Wendung,Norm Wood,Shepard A. Clough,Eli J. Mlawer,Gail P. Anderson,Henry E. Revercomb,T. Shippert +12 more
TL;DR: The first International Pyrgeometer and Absolute Sky-scanning Radiometer Comparison as discussed by the authors was held at the Atmospheric Radiation Measurement program's Southern Great Plains site in Oklahoma, which answered these questions at least for midlatitude summer conditions and reflects the state of the art for atmospheric longwave radiation measurements and calculations.
Journal ArticleDOI
Recent Progress in Reducing the Uncertainty in and Improving Pyranometer Calibrations
TL;DR: The measurement and instrumentation team within the Distributed Energy Resources Center at the National Renewable Energy Laboratory, NREL, calibrates pyranometers for outdoor testing solar energy conversion systems as mentioned in this paper.
Journal ArticleDOI
A method to calibrate a solar pyranometer for measuring reference diffuse irradiance
TL;DR: In this article, the authors presented a method to consistently calibrate pyranometers for measuring the diffuse component with an estimated uncertainty of ±(3% of reading+1 W/m 2 ).