AIRS/Aqua Level 1B AMSU (A1/A2) geolocated and calibrated brightness temperatures V005 (AIRABRAD) at GES DISC
Entry ID: GES_DISC_AIRABRAD_V005
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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)
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
Description: Access the AIRS Level 1B AMSU-A1 and AMSU-A2 Combined Geolocated and Calibrated Brightness Temperatures data by FTP.
Link: GET DATA > MIRADOR
Description: Access the AIRS Level 1B AMSU-A1 and AMSU-A2 Combined Geolocated and Calibrated Brightness Temperatures data via MIRADOR.
Link: GET DATA > OPENDAP DIRECTORY (DODS)
Description: Access the AIRS Level 1B AMSU-A1 and AMSU-A2 Combined Geolocated and Calibrated Brightness Temperatures data through OPeNDAP.
Link: GET DATA > SSW
Description: Access the AIRS Level 1B AMSU-A1 and AMSU-A2 Combined Geolocated and Calibrated Brightness Temperatures data using Simple Subset Wizard (Search and subset by date and spatial region).
Link: GET DATA > REVERB
Description: Refine your granule search with ECHO's next generation Earth Science discovery tool (Reverb) using information from this record.
Link: VIEW PROJECT HOME PAGE
Description: AIRS home page at NASA/JPL. General information on the AIRS instrument suite, algorithms, and other AIRS-related activities can be found.
Link: VIEW RELATED INFORMATION
Description: AIRS data support home page at Goddard Earth Sciences Data Information and Service Center/Distributed Active Archive Center (GES DISC DAAC). Online documentation, software to read, visualize and analyze AIRS data and data access information are available from this web site.
Link: VIEW RELATED INFORMATION > USER'S GUIDE
Description: README Document for AIRABRAD
|N: 90.0||S: -90.0||E: 180.0||W: -180.0||
Data Set Citation
AIRS Science Team/Moustafa Chahine
Dataset Title: AIRS/Aqua Level 1B AMSU (A1/A2) geolocated and calibrated brightness temperatures
Dataset Series Name: AIRABRAD
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 Data
Online Resource: http://disc.sci.gsfc.nasa.gov/datacollection/AIRABRAD_V005.html
|Start Date: 2002-05-21|
> ATLANTIC OCEAN
OCEAN > INDIAN OCEAN
OCEAN > PACIFIC OCEAN
GEOGRAPHIC REGION > GLOBAL
GEOGRAPHIC REGION > GLOBAL LAND
GEOGRAPHIC REGION > GLOBAL OCEAN
40.6 kilometers IFOV at nadir
Longitude Resolution: 40.6 kilometers IFOV at nadir
Temporal Resolution: Twice per day; Day and Night; Orbital repeat cycle 16 days
|SPECTRAL/ENGINEERING >MICROWAVE >BRIGHTNESS TEMPERATURE [Definition]|
ISO Topic Category
IMAGERY/BASE MAPS/EARTH COVER
|AQUA >Earth Observing System, AQUA [Information]|
|AMSU-A >Advanced Microwave Sounding Unit-A [Information]|
|EOSDIS >Earth Observing System Data Information System [Information]|
|ESIP >Earth Science Information Partners Program [Information]|
|AQUA >Earth Observing System (EOS), AQUA [Information]|
|CWIC >CEOS WGISS Integrated Catalog [Information]|
Data are expected to be available from the GSFC Earth Sciences (GES)|
Distributed Active Archive Center (DAAC) about one year after
launch. The DAAC Science Team will provide regular updates regarding
data product releases in the future.
|Corrected Microwave Antenna Temperatures|
|Corrected Microwave Antenna Temperatures Uncertainties|
Data Set Progress
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA
Data Center URL: http://disc.gsfc.nasa.gov/
Distribution_Size: 0.4 MB
Role: DIF AUTHOR
Email: asghar.e.esfandiari at nasa.gov
Goddard Earth Sciences Data and Information Services Center
NASA Goddard Space Flight Center
Province or State: MD
Postal Code: 20771
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