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PREFIRE's Thermal Infrared Spectrometer (TIRS-PREFIRE) aboard the PREFIRE-SAT1 CubeSat measures mid- and far-infrared radiation across 63 spectral channels from approximately 5 to 53 µm. This dataset contains derived spectral flux at the top of the atmosphere and broadband Outgoing Longwave Radiation (OLR), retrieved via an Optimal Estimation method using auxiliary cloud and meteorological data. Its primary purpose is to quantify the polar energy budget by characterizing previously unmeasured far-infrared emissions on a large scale.
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