[Personnel: Last_Name='WENTZ', First_Name='FRANK']
NRT AMSR-E/Aqua L2B Global Swath Ocean Products derived from Wentz AlgorithmEntry ID: AE_Ocean_NRT
Abstract: The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) instrument on the NASA EOS Aqua satellite provides global passive microwave measurements of terrestrial, oceanic, and atmospheric variables for the investigation of global water and energy cycles.
These near real-time (NRT) products are generated within 3 hours of the last observations in the file, by the Land ... Atmosphere Near real-time Capability for EOS (LANCE) at the AMSR-E Science Investigator-led Processing System (AMSR-E SIPS). Measurements of ocean variables improve our understanding of a wide variety of hydrological and radiative processes, including air-sea and air-ice interactions. The AMSR-E/Aqua Level-2B ocean product includes Sea Surface Temperature at 56 and 38 km, near-surface wind speed at 38 and 21 km, columnar water vapor at 21 km, and columnar cloud liquid water at 12 km, generated by the Wentz algorithm using Level-2A TBs. Data are stored in HDF-EOS format, and are available via FTP from the LANCE system.
If data latency is not a primary concern, please consider using science quality products. Science products are created using the best available ancillary, calibration and ephemeris information. Science quality products are an internally consistent, well-calibrated record of the Earth¹s geophysical properties to support science. Science quality AMSR-E products are available from NSIDC DAAC.
Data Set Citation
Dataset Originator/Creator: F. Wentz and T. Meissner
Dataset Title: AMSR-E/Aqua L2B Global Swath Ocean Products derived from Wentz Algorithm
Dataset Release Date: 2004-01-01
Start Date: 2015-07-21Stop Date: 2015-07-28
Temporal Resolution: Each swath spans 50 minutes
Temporal Resolution Range: 1 minute - < 1 hour
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > PRECIPITABLE WATER
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR
ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS
ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD LIQUID WATER/ICE
ATMOSPHERE > CLOUDS > CLOUD MICROPHYSICS > CLOUD PRECIPITABLE WATER
OCEANS > OCEAN TEMPERATURE > SEA SURFACE TEMPERATURE
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > OCEAN WINDS > SURFACE WINDS
ISO Topic Category
Quality Differences between the LANCE NRT and standard products are currently under investigation. Known, but not yet quantified, differences include
• the ephemeris files (LANCE uses predicted ephemeris and standard products use definitive ephemeris) and
• standard product generation includes more sophisticated, dynamic ... cross calibration and geolocation processes.
Each HDF-EOS file contains core metadata with QA metadata flags that are set by the Science Investigator-led Processing System (SIPS) at the Global Hydrology and Climate Center (GHCC) prior to delivery to NSIDC. A separate metadata file (.xml file extension) is also delivered to NSIDC with the HDF-EOS file; it contains the same information as the core metadata. Three levels of quality assessment (QA) are conducted with the AMSR-E Level 2 and 3 products: automatic, operational, and science QA. If a product does not fail QA, it is ready to be used for higher-level processing, browse generation, active science QA, archive, and distribution. If a granule fails QA, SIPS does not send the granule to NSIDC until it is reprocessed. Level-3 products that fail QA are never delivered to NSIDC (Conway 2002). The Level-2B ocean files contain three data elements related to quality assurance: the Scan_quality_flag, the Ocean_summary_quality_flag, and the Ocean_products_quality_flag.
Access Constraints You must register using the EOSDIS User Registration System in order to access LANCE NRT AMSR-E data. You can register at https://users.eosdis.nasa.gov/urs/.
Data Set Progress
Distribution Media: FTP
Distribution Size: 9 MB per granule
Distribution Format: HDF-EOS
Role: DIF AUTHOR
Email: support-ghrc at earthdata.nasa.gov
320 Sparkman Dr.
Province or State: AL
Postal Code: 35805
Email: support at remss.com
444 Tenth Street, Suite 200
City: Santa Rosa
Province or State: California
Postal Code: 95401
Role: TECHNICAL CONTACT
Email: ghrcdaac at itsc.uah.edu
GHRC User Services Office Global Hydrology Resource Center (GHRC) 320 Sparkman Drive
Province or State: AL
Postal Code: 35805
Conway, D. 2002. Advanced Microwave Scanning Radiometer - EOS Quality Assurance Plan. Huntsville, AL: Global Hydrology and Climate Center.
Meissner, Thomas and Frank J. Wentz. 2004. The Complex Dielectric Constant of Pure and Sea Water from Microwave Satellite Observations. IEEE TGARS 42(9): 1836 1849.
Meissner, Thomas and Frank J. Wentz. 2006. Ocean Retrievals for ... WindSat: ... Radiative Transfer Model, Algorithm, Validation. CD with proceedings of the 9th Specialist Meeting on Microwave Radiometry and Remote Sensing Applications. San Juan, Puerto Rico, 28 February - 03 March 2006. IEEE Catalog no. 06EX1174C.
Meissner, Thomas and Frank J. Wentz. 2002. Analysis of the Ocean Surface Wind Direction Signal in Passive Microwave Brightness Temperatures. IEEE TGARS 40(6): 1230 - 1240.
Wentz, F. J., and T. Meissner. 2007. Algorithm Theoretical Basis Document: AMSR-E Ocean Algorithms Supplement 1. Santa Rosa, California, USA: Remote Sensing Systems. (View PDF File)
Wentz, F. and T. Meissner. 2000. AMSR Ocean Algorithm. Algorithm Theoretical Basis Document, Version 2. Santa Rosa, CA, USA: Remote Sensing Systems. Wentz, Frank J. 1997. A Well-calibrated Ocean Algorithm for SSM/I. Journal of Geophy. Res 102: 8703 8718.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2010-08-10
Last DIF Revision Date: 2014-10-17