AIRS/Aqua L1C Infrared (IR) resampled and corrected radiances V6.7 (AIRICRAD) at GES DISC

Description

WARNING: AIRS L1C v6.7 has been impacted by an Aqua Deep Space Maneuver on Sept 23, 2021. Full data impact is still being assessed and an update to the AIRS L1C product will be available as soon as possible. Please check back for more details. 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 1C data set contains AIRS infrared calibrated and geolocated radiances in W/m2/micron/ster. This data set is generated from AIRS level 1B data. The spectral coverage of L1C data is from 3.74 to 15.4 mm. The nominal spectral resolution lambda / delta lambda = 1200. The spectrum is sampled twice per spectral resolution element in a total of 2645 spectral channels. A day of AIRS data is divided into 240 granules (scenes) each of 6-minute duration. For the AIRS IR measurements, an individual granule contains 135 pixels across-track and 90 along-track pixels; there are total of 135 x 90 = 12,150 pixels per granule. AIRS employs a 49.5 degree crosstrack scanning with a 1.1 degree instantaneous field of view (IFOV) to provide twice daily coverage of essentially the entire globe in a 1:30 PM sun synchronous orbit with the 13.5 x 13.5 km2 spatial resolution at nadir. The L1C swath products are derived from the L1B swath products. The primary purpose of the level 1C is to generate the spectra of radiances without spectral gaps caused by the instrument design and bad spectral points. The AIRS L1C data can be used for comparative (with other IR measurements) studies and for weather-climate research. This is the latest version of this collection. The DOIs assigned to previous versions, which are no longer available, now direct to this page. For this collection the switchover occurred on June 1, 2020.

Resources

Name Format Description Link
21 Search results for publications that cite this dataset by its DOI. https://scholar.google.com/scholar?q=10.5067%2FVWD3DRC07UEN
22 Sample image of an AIRICRAD v6.7 radiances https://docserver.gesdisc.eosdis.nasa.gov/public/project/Images/AIRICRAD.v6.7.jpg
33 README Document https://docserver.gesdisc.eosdis.nasa.gov/public/project/AIRS/README.AIRICRAD.v6.7.pdf
33 Algorithm Theoretical Basis Document https://docserver.gesdisc.eosdis.nasa.gov/public/project/AIRS/AIRICRAD.v6.7.ATBD.pdf
21 AIRS Documentation Page https://disc.gsfc.nasa.gov/information/documents?title=AIRS+Documentation
21 Access the data via the OPeNDAP protocol. https://airsl1.gesdisc.eosdis.nasa.gov/opendap/Aqua_AIRS_Level1/AIRICRAD.6.7/
21 Access the data via HTTPS. https://airsl1.gesdisc.eosdis.nasa.gov/data/Aqua_AIRS_Level1/AIRICRAD.6.7/
21 AIRS home page at NASA/JPL. General information on the AIRS instrument suite, algorithms, and other AIRS-related activities can be found. https://airs.jpl.nasa.gov/index.html
21 Access the dataset landing page from the GES DISC website. https://disc.gsfc.nasa.gov/datacollection/AIRICRAD_6.7.html

Tags

  • infrared-wavelengths
  • aerosols
  • atmosphere
  • atmospheric-chemistry
  • spectral-engineering
  • earth-science

Topics

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