Comparisons of unfiltered radiances measured by CERES instruments aboard three different satellites, Terra, Aqua, and NPP-Suomi are presented. To enable a comparison at the unfiltered radiance level, viewing geometries of the instruments are matched in the minor plane about 68°N around the summer solstice time for the smallest solar zenith angles of measurements for these high latitudes. Data set for comparison for CERES on Terra and Aqua has been collected since 2002, and for Terra and NPP-S since 2012 in annual field campaigns. For the former, data are collected in June, and for the latter from May to July of each year. Results of comparison are reported for all-sky condition and
Z. Peter Szewczyk, G. Louis Smith, and Kory J. Priestley, "Comparison of unfiltered radiances measured in the minor plane by CERES scanners around the time of summer solstices," Proc. SPIE 10001, Remote Sensing of Clouds and the Atmosphere XXI, 1000108 (Presented at SPIE Remote Sensing: September 28, 2016; Published: 19 October 2016); https://doi.org/10.1117/12.2240953.
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