AIRS/Aqua L1B Near Real Time (NRT) Infrared (IR) geolocated and calibrated radiances V8.0 (AIRSAQIRL1B_NRT) at GES DISC

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. The AIRS Infrared (IR) level 1B data set contains AIRS calibrated and geolocated radiances in milliWatts/m^2/cm^-1/steradian for 2378 infrared channels in the 3.74 to 15.4 micron region of the spectrum.

The AIRS Level 1B Near Real Time (NRT) product (AIRSIRAQL1B_NRT_v8.0) differs from the routine product (AIRSAQIRL1B_8) in 2 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. The consequences of these differences are described in the AIRS Near Real Time (NRT) data products document.

The products are stored in files (often referred to as "granules") that contain 6 minutes of data, 90 footprints across track by 135 lines along track.

Data and Resources

Additional Info

Field Value
Maintainer Lena Iredell
Last Updated March 27, 2025, 14:22 (UTC)
Created February 19, 2025, 12:23 (UTC)
accessLevel public
bureauCode {026:00}
catalog_@context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
catalog_@id https://data.nasa.gov/data.json
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation AIRS project. 2025-01-30. AIRSAQIRL1B_NRT. Version 8.0. AIRS/Aqua L1B Near Real Time (NRT) Infrared (IR) geolocated and calibrated radiances V8.0 (AIRSAQIRL1B_NRT) . 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/AIRSAQIRL1B_NRT_8.0.html. Digital Science Data.
creator AIRS project
data-presentation-form Digital Science Data
graphic-preview-description Sample image of AIRSAQIRL1B_NRT
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/AIRIBRAD_005.jpeg
harvest_object_id b3873367-b2a3-49af-b459-843fca92320a
harvest_source_id b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title DNG Legacy Data
identifier C3173404183-GES_DISC
issued 2025-02-25
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C3173404183-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2025-03-14
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name AIRSAQIRL1B_NRT
source_datajson_identifier true
source_hash 3f22bf3cea89303e888c2821fdff4fcc6b42b7921c2d31a00082b10c822f83bb
source_schema_version 1.1
spatial -180.0 -90.0 180.0 90.0
temporal 2002-08-30T00:00:00Z/2025-03-17T00:00:00Z
theme {Aqua,LANCE,geospatial}