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PREFIRE Level 1A Calibrated Spectral Radiance from PREFIRE Satellite 1 R01

Published by NASA/LARC/SD/ASDC | National Aeronautics and Space Administration | Catalog Last Checked: July 14, 2026 at 10:21 PM | Dataset Last Updated: June 23, 2026
PREFIRE (Polar Radiant Energy in the Far InfraRed Experiment) Level 1A Calibrated Spectral Radiance from PREFIRE Satellite 1 (PREFIRE_SAT1_1A-RAD) contains calibrated radiance data retrieved from data collected by the PREFIRE Thermal Infrared Spectrometer (TIRS-PREFIRE) aboard PREFIRE-SAT1. Dual CubeSats each carry a TIRS-PREFIRE, a push broom spectrometer with 63 channels measuring mid- and far-infrared (FIR) radiation from approximately 5 to 53 µm. Most polar emissions are in the FIR but have not been measured on a large scale. PREFIRE aims to fill knowledge gaps in the global energy budget by more accurately characterizing polar emissions. This information will be assimilated into global circulation and other models to predict future conditions more accurately. Digital number counts from the PREFIRE_SAT1_0-PAYLOAD-TLM collection are converted to radiance and calibrated using an internal blackbody target and space-look data. The PREFIRE_SAT1_1A-RAD data is used as input for PREFIRE_SAT1_1B-RAD, which is geolocated radiance. Given that it is not geolocated, PREFIRE_SAT1_1A-RAD is not useful for direct scientific study. Data retrieval started July 24, 2024, and is ongoing. Geographic coverage is global, with the greatest concentration of data in the polar regions. This data has a temporal resolution of 0.707 seconds and is available in netCDF-4. Calibrated radiance data for the sister instrument aboard PREFIRE-SAT2 can be found in the PREFIRE_SAT2_1A-RAD collection.

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Complete Metadata
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accessLevel public
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description PREFIRE (Polar Radiant Energy in the Far InfraRed Experiment) Level 1A Calibrated Spectral Radiance from PREFIRE Satellite 1 (PREFIRE_SAT1_1A-RAD) contains calibrated radiance data retrieved from data collected by the PREFIRE Thermal Infrared Spectrometer (TIRS-PREFIRE) aboard PREFIRE-SAT1. Dual CubeSats each carry a TIRS-PREFIRE, a push broom spectrometer with 63 channels measuring mid- and far-infrared (FIR) radiation from approximately 5 to 53 µm. Most polar emissions are in the FIR but have not been measured on a large scale. PREFIRE aims to fill knowledge gaps in the global energy budget by more accurately characterizing polar emissions. This information will be assimilated into global circulation and other models to predict future conditions more accurately. Digital number counts from the PREFIRE_SAT1_0-PAYLOAD-TLM collection are converted to radiance and calibrated using an internal blackbody target and space-look data. The PREFIRE_SAT1_1A-RAD data is used as input for PREFIRE_SAT1_1B-RAD, which is geolocated radiance. Given that it is not geolocated, PREFIRE_SAT1_1A-RAD is not useful for direct scientific study. Data retrieval started July 24, 2024, and is ongoing. Geographic coverage is global, with the greatest concentration of data in the polar regions. This data has a temporal resolution of 0.707 seconds and is available in netCDF-4. Calibrated radiance data for the sister instrument aboard PREFIRE-SAT2 can be found in the PREFIRE_SAT2_1A-RAD collection.
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identifier 10.5067/PREFIRE-SAT1/PREFIRE/RAD_L1A.R01
keyword 
[
  "earth-science-atmospheric-radiation-atmosphere-earth-radiation-budget",
  "earth-science-atmospheric-radiation-atmosphere-longwave-radiation",
  "earth-science-infrared-wavelengths-spectral-engineering-infrared-radiance"
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license https://www.usa.gov/government-works
modified 2026-06-23
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spatial 
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temporal 2024-07-24/2026-06-15
theme 
[
  "Earth Science"
]
title PREFIRE Level 1A Calibrated Spectral Radiance from PREFIRE Satellite 1 R01

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