AIRS/Aqua L2 Near Real Time (NRT) Cloud-Cleared Infrared Radiances (AIRS-only) V006 (AIRS2CCF_NRT) at GES DISC

The Atmospheric Infrared Sounder (AIRS) Level 2 Near Real Time (NRT) Cloud-Cleared Infrared Radiances (AIRS-only) product (AIRS2CCF_NRT_006) differs from the routine product (AIRS2CCF_006) in four ways to meet the three hour latency requirements of the Land Atmosphere NRT Capability Earth Observing System (LANCE): (1) The NRT granules are produced without previous or subsequent granules if those granules are not available within 5 minutes, (2) the predictive ephemeris/attitude data are used rather than the definitive ephemeris/attitude, (3) if the forecast surface pressure is unavailable, a surface climatology is used, and (4) no ice cloud properties retrievals are performed. The consequences of these differences are described in the AIRS Near Real Time (NRT) data products document. The Atmospheric Infrared Sounder (AIRS) is a grating spectrometer (R = 1200) aboard the second Earth Observing System (EOS) polar-orbiting platform, EOS Aqua. In combination with the Advanced Microwave Sounding Unit (AMSU) and the Humidity Sounder for Brazil (HSB), AIRS constitutes an innovative atmospheric sounding group of visible, infrared, and microwave sensors. This product is produced using AIRS IR only because the radiometric noise in AMSU channel 4 started to increase significantly (since June 2007). Cloud-Cleared Radiances contain calibrated, geolocated channel-by-channel AIRS infrared radiances (milliWatts/m2/cm-1/steradian) that would have been observed within each AMSU footprint if there were no clouds in the FOV and produced along with the AIRS Standard Product, as they are the radiances used to retrieve the Standard Product. Nevertheless, they are an order of magnitude larger in data volume than the remainder of the Standard Products and, many Standard Product users are expected to have little interest in the Cloud Cleared Radiance. For these reasons they are a separate output file. The AIRS2CCF_NRT_006 products are stored in files (often referred to as "granules") that contain 6 minutes of data, 30 footprints across track by 45 lines along track.

Data and Resources

Additional Info

Field Value
Maintainer ED ESFANDIARI
Last Updated March 31, 2025, 20:38 (UTC)
Created March 31, 2025, 20:38 (UTC)
accessLevel public
bureauCode {026:00}
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citation AIRS Science Team/Joao Teixeira. 2016-10-15. AIRS2CCF_NRT. Version 006. AIRS/Aqua L2 Near Real Time (NRT) Cloud-Cleared Infrared Radiances (AIRS-only) V006. Greenbelt, MD, USA. Archived by National Aeronautics and Space Administration, U.S. Government, Goddard Earth Sciences Data and Information Services Center (GES DISC). https://disc.gsfc.nasa.gov/datacollection/AIRS2CCF_NRT_006.html. Digital Science Data.
creator AIRS Science Team/Joao Teixeira
data-presentation-form Digital Science Data
graphic-preview-description Sample data of the "AIRS/Aqua Level 2 Cloud-Cleared Infrared (IR) Radiances Product".
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/AIRS2CCF_NRT_006.jpeg
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harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C1345119267-GES_DISC
issued 2024-07-03
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1345119267-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2024-08-07
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
references {https://doi.org/10.1109/TGRS.2002.808236,https://doi.org/10.1117/1.JRS.8.084994}
release-place Greenbelt, MD, USA
resource-type Dataset
series-name AIRS2CCF_NRT
source_datajson_identifier true
source_hash 6386a50fd36a110f3372a77f0b37e5ec038e1c78a9641fe59454b049553e05aa
source_schema_version 1.1
spatial -180.0 -90.0 180.0 90.0
temporal 2016-10-15T00:00:00Z/2024-08-12T00:00:00Z
theme {Aqua,LANCE,geospatial}