edu.ucar.opensky::technotes:131 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T16:54:28.154867 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7wd3zzm Preprocessing of Airborne Pyranometer Data 1991-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7wd3zzm https://doi.org/10.5065/D6MK69T4 Bannehr, L. author Glover, V. author UCAR/NCAR - Library publisher Eppley pyranometers are employed to measure the up- and downwelling short wavelength radiation fluxes in the atmosphere. The quality of the data used to investigate the radiation budget and extinction of solar irradiance depends strongly on the calibration and correction applied to the radiation data, accounting for (1) cosine response of the instruments, (2) ambient temperature effects, (3) leveling of the radiometers, and (4) aircraft maneuvers during the observations. This report makes suggestions about how the quality of the radiation data can be enhanced by a more accurate calibration procedure and correction scheme. By considering the recommendations, data from the upward facing pyranometer can be improved by about 20% under clear sky conditions. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Calibration Shortwave radiation Sensor characteristics theme U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2021-09-17 revision 11.2 NASA Global Change Master Directory originator Valids List: Science and Services Keywords Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation