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You are here: GES DISC Home AIRVBRAD_NRT Version 005: AIRS/Aqua Near Real Time (NRT) Level 1B Visible/Near Infrared (VIS/NIR) geolocated and calibrated radiances

AIRVBRAD_NRT Version 005: AIRS/Aqua Near Real Time (NRT) Level 1B Visible/Near Infrared (VIS/NIR) geolocated and calibrated radiances

Data Citation

To cite the data in publications:
AIRS Science Team/Moustafa Chahine (2007),AIRS/Aqua Near Real Time (NRT) Level 1B Visible/Near Infrared (VIS/NIR) geolocated and calibrated radiances,version 005, Greenbelt, MD, USA:Goddard Earth Science Data and Information Services Center (GES DISC), Accessed Enter User Data Access Date at http://disc.sci.gsfc.nasa.gov/datacollection/AIRVBRAD_NRT_V005.html

Product Description


The Atmospheric Infrared Sounder (AIRS) is a facility instrument 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 Visible/Near Infrared (VIS/NIR) level 1B data set contains AIRS visible and near-infrared calibrated and geolocated radiances in W/m^2/micron/steradian. This data set is generated from AIRS level 1A digital numbers (DN), including 4 channels in the 0.4 to 1.0 um region of the spectrum. A day's worth of AIRS data is divided into 240 scenes each of 6 minute duration. For the AIRS visible/near IR measurements, an individual scene contains 135 scanlines with a scanline containing 720 cross-track pixels and 9 along-track pixels; there is a total of 720 x 9 x 135 = 874,800 visible/near-IR pixels per scene.

AIRS employs a 49.5 degree crosstrack scanning with a 1.1 degree instantaneous field of view (IFOV) to provide twice daily (day and night) coverage of essentially the entire globe in a 1:30 PM sun synchronous orbit from a 705 km altitude. The primary purpose of the visible/near IR channels is the detection and flagging of significant inhomogeneities in the AIRS infrared field-of-view,which may adversely impact the quality of the temperature and moisture soundings. The AIRS VIS/NIR channels will also be used for comparative studies with the higher resolution MODIS channels contained within this spectral region.

(The Shortname for this product is AIRVBRAD_NRT)
Coverage: Global, Twice Daily (Daytime and Nighttime)
Resolution: 2.3 km IFOV at nadir
Spectral Range: Four channels, from 0.4 - 1.0 um:
Wavelengths at 50% peak response:
Channel 1 0.41 um - 0.44 um
Channel 2 0.5 ... View entire text

Product Summary

Short Name:    AIRVBRAD_NRT

Long Name:    AIRS/Aqua Near Real Time (NRT) Level 1B Visible/Near Infrared (VIS/NIR) geolocated and calibrated radiances

Version:    005

Format    HDF-EOS

Spatial Coverage:   (90.0 N to -90.0 S; 180.0 E to -180.0 W)

Temporal Coverage: 2015-06-25 to 2015-07-02



Data Resolution:
Latitude Resolution: 2.3 kilometers IFOV at nadir
Longitude Resolution: 2.3 kilometers IFOV at nadir
Temporal Resolution: Once per day; Day only; Orbital repeat cycle 16 days


File Size:    12.0 MB

Quality:

V5_CalVal_Status_Summary.pdf
http://disc.sci.gsfc.nasa.gov/AIRS/documentation/v5_docs/AIRS_V5_Release_User_Docs/V5_CalVal_Status_Summary.pdf


Data Access

Data Service Name: ON-LINE ARCHIVE
Data Service Description: Access the AIRS/Aqua Near Real Time (NRT) Level 1B Visible/Near Infrared (VIS/NIR) geolocated and calibrated radiances by FTP. User registration is required. Register for a username and password at https://urs.eosdis.nasa.gov/users/new
Data Service Access URL: ftp://discnrt1.gesdisc.eosdis.nasa.gov/ftp/data/Aqua_NRT/AIRVBRAD_NRT.005/

Data Service Name: OPENDAP DIRECTORY (DODS)
Data Service Description: Access the the AIRS/Aqua Near Real Time (NRT) Level 1B Visible/Near Infrared (VIS/NIR) geolocated and calibrated radiances through OPeNDAP.
Data Service Access URL: http://discnrt1.gesdisc.eosdis.nasa.gov/opendap/Aqua_AIRS_NRT/AIRVBRAD_NRT.005/contents.html

Data Service Name: DATACAST URL
Data Service Description: Access the AIRS/Aqua Near Real Time (NRT) Level 1B Visible/Near Infrared (VIS/NIR) geolocated and calibrated radiances via datacasting.
Data Service Access URL: http://discnrt1.gesdisc.eosdis.nasa.gov/datacasting/AIRVBRAD_NRT.005.datacast-feed.xml

Data Service Name: REVERB
Data Service Description: Refine your granule search with ECHO's next generation Earth Science discovery tool (Reverb) using information from this record.
Data Service Access URL: http://reverb.echo.nasa.gov/reverb/#utf8=%E2%9C%93&spatial_map=satellite&spatial_type=rectangle&keywords=GES_DISC_AIRVBRAD_NRT_V005

For further information or assistance email the NASA GES DISC Help Desk: gsfc-help-disc@lists.nasa.gov
Product README

Global Change Master Directory Catalog Entry (GCMD DIF):
http://gcmd.gsfc.nasa.gov/getdif.htm?GES_DISC_AIRVBRAD_NRT_V005

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Last updated: Mar 13, 2015 09:12 AM ET
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