Polar Radiant Energy in the Far InfraRed Experiment (PREFIRE) Satellite 1 Cloud Mask R01

Description

Polar Radiant Energy in the Far InfraRed Experiment (PREFIRE) Satellite 1 Cloud Mask (PREFIRE_SAT1_2B-MSK) contains a binary clear/cloud indicator and probabilities derived from data collected by the PREFIRE Thermal Infrared Spectrometer (TIRS-PREFIRE) aboard PREFIRE-SAT1. Dual CubeSats each carry a PREFIRE Thermal Infrared Spectrometer (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 then be assimilated into global circulation and other models to predict future conditions more accurately. PREFIRE_SAT1_2B-MSK is derived from mid-infrared and far-infrared measurements collected globally by TIRS-PREFIRE aboard PREFIRE-SAT1 using a Machine Learning technique. Specifically, inputs are PREFIRE Spectral Radiance (PREFIRE_SAT1_1B-RAD) from PREFIRE Satellite 1 (PREFIRE_SAT1_2B-RAD) and PREFIRE Auxiliary Meteorology Data created for PREFIRE Satellite 1 (PREFIRE_SAT1_AUX-MET). PREFIRE_SAT1_2B-MSK is used to identify cloudy and clear scenes in TIRS-PREFIRE data, which supports the production of other Level 2 PREFIRE products. These include variables such as top of atmosphere spectral flux, surface spectral emissivity, and atmospheric properties such as temperature and water vapor profiles. Science data retrieval started July 24, 2024 and is ongoing. Geographic coverage is global, with the greatest concentration of data in the polar regions. Within the orbital swath there are eight distinct tracks of data associated with the eight separate spatial scenes for each PREFIRE-TIRS. At the beginning of the mission, the approximate scene footprint sizes were 11.8 km x 34.8 km (cross-track x along-track), with gaps between each scene of approximately 24.2 km. The entire swath was ~264 km across. Note that the scene footprint and swath sizes quoted here are for the orbit altitude soon after launch. However, the footprint size will slowly become smaller as the orbit altitude decreases with time. This data has a temporal resolution of 0.707 seconds and is available in netCDF-4. The cloud identification data for the sister instrument aboard PREFIRE-SAT2 can be found in the PREFIRE_SAT2_2B-MSK collection.

Resources

Name Format Description Link
33 PREFIRE_Data_User_Guide_2B-MSK_R01.pdf https://asdc.larc.nasa.gov/documents/prefire/guide/PREFIRE_Data_User_Guide_2B-MSK_R01.pdf
5 https://asdc.larc.nasa.gov%2Fstatic%2Fimages%2Fproject_logos%2Fprefire.png
5 https://asdc.larc.nasa.gov%2Fproject%2FPREFIRE
5 https://science.jpl.nasa.gov%2Fprojects%2Fprefire%2F
5 https://prefire.ssec.wisc.edu%2F
5 https://asdc.larc.nasa.gov%2Fdocuments%2Fprefire%2Fguide%2FPREFIRE_Data_User_Guide_2B-MSK_R01.pdf
5 https://science.nasa.gov%2Fmission%2Fprefire%2F
5 https://doi.org%2F10.5067%2FPREFIRE-SAT1%2FPREFIRE%2FMSK_L2B.R01
5 https://search.earthdata.nasa.gov%2Fsearch%2Fgranules%3Fp%3DC3499202417-LARC_CLOUD
5 https://asdc.larc.nasa.gov%2Fciting-data
5 https://asdc.larc.nasa.gov%2Fdocuments%2Fprefire%2FATBD%2FPREFIRE_2B-MSK_ATBD-20250430.pdf
34 prefire.png https://asdc.larc.nasa.gov/static/images/project_logos/prefire.png
5 https://asdc.larc.nasa.gov/project/PREFIRE
5 https://science.jpl.nasa.gov/projects/prefire/
5 https://prefire.ssec.wisc.edu/
5 https://science.nasa.gov/mission/prefire/
21 MSK_L2B.R01 https://doi.org/10.5067/PREFIRE-SAT1/PREFIRE/MSK_L2B.R01
5 https://search.earthdata.nasa.gov/search/granules?p=C3499202417-LARC_CLOUD
5 https://asdc.larc.nasa.gov/citing-data
33 PREFIRE_2B-MSK_ATBD-20250430.pdf https://asdc.larc.nasa.gov/documents/prefire/ATBD/PREFIRE_2B-MSK_ATBD-20250430.pdf
33 gte_fmt.pdf https://asdc.larc.nasa.gov/documents/gte/guide/gte_fmt.pdf
5 gte_hmpg.htm https://www-gte.larc.nasa.gov/gte_hmpg.htm#table
5 gte_fld.htm https://www-gte.larc.nasa.gov/gte_fld.htm
5 pemb_hmpg.htm https://www-gte.larc.nasa.gov/pem/pemb_hmpg.htm
5 pemb_rslt.htm https://www-gte.larc.nasa.gov/pem/pemb_rslt.htm
5 pemb_part.htm https://www-gte.larc.nasa.gov/pem/pemb_part.htm
5 https://search.earthdata.nasa.gov/search/granules?p=C2969215034-LARC_CLOUD
21 https://doi.org/PEM-West-B_MetNav_AircraftInSitu_DC8_Data_1
34 prefire.png https://asdc.larc.nasa.gov/static/images/project_logos/prefire.png
5 https://science.jpl.nasa.gov/projects/prefire/
5 https://prefire.ssec.wisc.edu/
5 https://science.nasa.gov/mission/prefire/
21 MSK_L2B.R01 https://doi.org/10.5067/PREFIRE-SAT1/PREFIRE/MSK_L2B.R01
5 https://search.earthdata.nasa.gov/search/granules?p=C3499202417-LARC_CLOUD
33 PREFIRE_2B-MSK_ATBD-20250430.pdf https://asdc.larc.nasa.gov/documents/prefire/ATBD/PREFIRE_2B-MSK_ATBD-20250430.pdf
5 https://asdc.larc.nasa.gov/project/PREFIRE
33 PREFIRE_Data_User_Guide_2B-MSK_R01.pdf https://asdc.larc.nasa.gov/documents/prefire/guide/PREFIRE_Data_User_Guide_2B-MSK_R01.pdf
5 https://search.earthdata.nasa.gov/search?q=PreDeltaX_Vegetation_Structure_1805&ac=true
21 https://doi.org/10.3334/ORNLDAAC/1805
57 PreDeltaX_Vegetation_Structure_1805.zip https://data.ornldaac.earthdata.nasa.gov/protected/bundle/PreDeltaX_Vegetation_Structure_1805.zip
34 PreDeltaX_Vegetation_Structure_Fig1.png https://daac.ornl.gov/DELTAX/guides/PreDeltaX_Vegetation_Structure_Fig1.png
5 https://deltax.jpl.nasa.gov/
33 PreDeltaX_Vegetation_Structure.pdf https://data.ornldaac.earthdata.nasa.gov/public/deltax/PreDeltaX_Vegetation_Structure/comp/PreDeltaX_Vegetation_Structure.pdf
0 The metadata's original source. https://cmr.earthdata.nasa.gov/search/concepts/C2025123672-ORNL_CLOUD.iso19115

Tags

  • earth-science-clouds-atmosphere-cloud-properties-cloud-amount
  • earth-science-clouds-atmosphere-cloud-properties-cloud-frequency

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