AIRS/Aqua Near Real Time (NRT) Level 1B AMSU (A1/A2) geolocated and calibrated brightness temperatures V005 (AIRABRAD_NRT) at GES DISCEntry ID: GES_DISC_AIRABRAD_NRT_V005
Abstract: 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. AIRS data will be generated continuously. ... Global coverage will be obtained twice daily (day and night) on a 1:30pm sun synchronous orbit from a 705-km altitude.
The AMSU-A level 1B data set contains AMSU-A calibrated and geolocated brightness temperatures in degrees Kelvin. This data set is generated from AMSU-A Level 1A digital numbers (DN), including 15 microwave channels in the 50 - 90 GHz and 23 - 32 GHz regions of the spectrum. A day's worth of data is divided into 240 scenes each of 6 minute duration. An AMSU-A scene contains 30 cross-track footprints in each of 45 along-track scanlines, for a total of 45 x 30 = 1350 footprints per scene. The AMSU-A is co-aligned with the AIRS instrument onboard the Aqua platform so that successive blocks of 3 x 3 AIRS footprints are contained within the 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. Combined with simultaneous measurements from the AIRS and HSB instruments, the calibrated AMSU-A brightness temperatures will also be used to initialize the surface temperature and atmospheric temperature profile required for the retrieval of the final AIRS geophysical products.
(The Shortname for this product is AIRABRAD_NRT).
Coverage: Global, Twice Daily (Daytime and Nighttime)
Resolution: 40.5 km IFOV at nadir
AMSU-A1: 13 channels from 50 - 90 GHz
AMSU-A2: 2 channels from 23 - 32 GHz
Data Set Citation
Dataset Originator/Creator: AIRS Science Team/Moustafa Chahine
Dataset Title: AIRS/Aqua Near Real Time (NRT) Level 1B AMSU (A1/A2) geolocated and calibrated brightness temperatures
Dataset Series Name: AIRABRAD_NRT
Dataset Release Date: 2007-07-26
Dataset Release Place: Greenbelt, MD, USA
Dataset Publisher: Goddard Earth Science Data and Information Services Center (GES DISC)
Data Presentation Form: Digital Science DataOnline Resource: http://disc.sci.gsfc.nasa.gov/datacollection/AIRABRAD_NRT_V005.html
Start Date: 2014-03-04Stop Date: 2014-03-11
Latitude Resolution: 40.6 km IFOV at nadir
Longitude Resolution: 40.6 km IFOV at nadir
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree
Temporal Resolution: Twice per day (daytime and nighttime)
Temporal Resolution Range: Daily - < Weekly
Access Constraints You must register using the EOSDIS User Registration System in order to access LANCE NRT AIRS data. You can register at https://urs.eosdis.nasa.gov/users/new.
Data Set Progress
Distribution Media: FTP
Distribution Size: 0.4 MB
Distribution Format: HDF-EOS
Role: DIF AUTHOR
Email: asghar.e.esfandiari at nasa.gov
Goddard Earth Sciences Data and Information Services Center Code 610.2 NASA Goddard Space Flight Center
Province or State: MD
Postal Code: 20771
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2010-06-23
Last DIF Revision Date: 2014-02-04