AIRS/Aqua L2 Near Real Time (NRT) Standard Physical Retrieval (AIRS-only) V006 (AIRS2RET_NRT) at GES DISC

The Atmospheric Infrared Sounder (AIRS) Level 2 Near Real Time (NRT) Standard Physical Retrieval (AIRS-only) product (AIRS2RET_NRT_006) differs from the routine product (AIRS2RET_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). The AIRS Standard Retrieval Product consists of retrieved estimates of cloud and surface properties, plus profiles of retrieved temperature, water vapor, ozone, carbon monoxide and methane. Estimates of the errors associated with these quantities is also part of the Standard Product. The temperature profile vertical resolution is 28 levels total between 1100 mb and 0.1 mb, while moisture profile is reported at 14 atmospheric layers between 1100 mb and 50 mb. The horizontal resolution is 50 km. An AIRS granule has been set as 6 minutes of data, 30 footprints cross track by 45 lines along track. There are 240 granules per day, with an orbit repeat cycle of approximately 16 day.

Data and Resources

Additional Info

Field Value
Maintainer ED ESFANDIARI
Last Updated March 31, 2025, 22:59 (UTC)
Created March 31, 2025, 22:59 (UTC)
accessLevel public
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citation AIRS Science Team/Joao Teixeira. 2016-10-15. AIRS2RET_NRT. Version 006. AIRS/Aqua L2 Near Real Time (NRT) Standard Physical Retrieval (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/AIRS2RET_NRT_006.html. Digital Science Data.
creator AIRS Science Team/Joao Teixeira
data-presentation-form Digital Science Data
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/AIRS2RET_NRT_006.jpeg
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harvest_source_id 61638e72-b36c-4866-9d28-551a3062f158
harvest_source_title DNG Legacy Data
identifier C1345119345-GES_DISC
issued 2024-07-03
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1345119345-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/10.5194/acp-14-399-2014,https://doi.org/10.1117/1.JRS.8.084994,https://doi.org/10.1002/2014JD022551,https://doi.org/10.1002/2014JD02166,https://doi.org/10.1002/2016JD024806,https://doi.org/10.1002/2015JD024008,https://doi.org/10.1029/2005/JD007020,https://doi.org/10.1109/TGRS.2002.808236}
release-place Greenbelt, MD, USA
resource-type Dataset
series-name AIRS2RET_NRT
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source_hash e8803fb082df86c0d59e3f7c08d675678254cb63c54f5bb04fedd237b56c6664
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}