AIRS/Aqua L1B Near Real Time (NRT) AMSU (A1/A2) geolocated and calibrated brightness temperatures V005 (AIRABRAD_NRT) at GES DISC

The AMSU-A Level 1B Near Real Time (NRT) product (AIRABRAD_NRT_005) differs from the routine product (AIRABRAD_005) 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 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 AMSU-A instrument is co-aligned with AIRS so that successive blocks of 3 x 3 AIRS footprints are contained within one AMSU-A footprint. AMSU-A is primarily a temperature sounder that provides atmospheric information in the presence of clouds, which can be used to correct the AIRS infrared measurements for the effects of clouds. This is possible because non-precipitating clouds are for the most part transparent to microwave radiation, in contrast to visible and infrared radiation which are strongly scattered and absorbed by clouds. AMSU-A1 has 13 channels from 50 - 90 GHz and AMSU-A2 has 2 channels from 23 - 32 GHz. The AIRABRAD_NRT_005 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 February 19, 2025, 05:48 (UTC)
Created February 19, 2025, 05:48 (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
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catalog_describedBy https://project-open-data.cio.gov/v1.1/schema/catalog.json
citation AIRS Science Team/Moustafa Chahine. 2007-07-26. AIRABRAD_NRT. Version 005. AIRS/Aqua L1B Near Real Time (NRT) AMSU (A1/A2) geolocated and calibrated brightness temperatures V005. 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/AIRABRAD_NRT_005.html. Digital Science Data.
creator AIRS Science Team/Moustafa Chahine
data-presentation-form Digital Science Data
graphic-preview-description Sample image of AIRABRAD
graphic-preview-file https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/AIRABRAD_NRT_005.jpeg
harvest_object_id 54d229ab-21e8-4b31-aea1-f580fcd836c6
harvest_source_id b37e5849-07d2-41cd-8bb6-c6e83fc98f2d
harvest_source_title DNG Legacy Data
identifier C1233769000-GES_DISC
issued 2024-11-17
landingPage https://cmr.earthdata.nasa.gov:443/search/concepts/C1233769000-GES_DISC.html
language {en-US}
metadata_type geospatial
modified 2024-11-20
programCode {026:001}
publisher NASA/GSFC/SED/ESD/GCDC/GESDISC
release-place Greenbelt, MD, USA
resource-type Dataset
series-name AIRABRAD_NRT
source_datajson_identifier true
source_hash 61b21b188ecd2eaccbec047ca4291899c09361254e8d890dc9ab5d3417053cf4
source_schema_version 1.1
spatial -180.0 -90.0 180.0 90.0
temporal 2015-12-15T00:00:00Z/2024-11-25T00:00:00Z
theme {Aqua,LANCE,geospatial}