MetOp-B ASCAT Level 2 25.0km Ocean Surface Wind Vectors in Full Orbit Swath

MetOp-B ASCAT Level 2 25.0km Ocean Surface Wind Vectors in Full Orbit Swath
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DOINot Registered
Short NameASCATB-L2-25km
DescriptionThis dataset contains operational near-real-time Level 2 ocean surface wind vector retrievals from the Advanced Scatterometer (ASCAT) on MetOp-B at 25 km sampling resolution (note: the effective resolution is 50 km). It is a product of the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT) Ocean and Sea Ice Satellite Application Facility (OSI SAF) provided through the Royal Netherlands Meteorological Institute (KNMI). The wind vector retrievals are currently processed using the CMOD.n geophysical model function using a Hamming filter to spatially average the Sigma-0 data in the ASCAT L1B data. Each file is provided in netCDF version 3 format, and contains one full orbit derived from 3-minute orbit granules. Latency is approximately 2 hours from the latest measurement. The beginning of the orbit is defined by the first wind vector cell measurement within the first 3-minute orbit granule that starts north of the Equator in the ascending node. ASCAT is a C-band dual swath fan beam radar scatterometer providing two independent swaths of backscatter retrievals in sun-synchronous polar orbit aboard the MetOp-B platform. For more information on the MetOp-B mission, please visit: http://podaac.jpl.nasa.gov/OceanWind/MetOp . For more timely announcements, users are encouraged to register with the KNMI scatterometer email list: scat@knmi.nl. Users are also highly advised to check the dataset user guide periodically for updates and new information on known problems and issues. All intellectual property rights of the OSI SAF products belong to EUMETSAT. The use of these products is granted to every interested user, free of charge. If you wish to use these products, EUMETSAT's copyright credit must be shown by displaying the words "copyright (year) EUMETSAT" on each of the products used.
VersionOperational/Near-Real-Time
Dataset TypePREVIEW
MeasurementOceans > Ocean Winds > Surface Winds > Ocean Surface Wind Vectors
Processing Level2
CoverageRegion: Global
Northernmost Latitude: 89.6 degrees
Southernmost Latitude: -89.6 degrees
Westernmost Longitude: 0 degrees
Easternmost Longitude: 360 degrees
Time Span: 2012-Oct-29 to Present
ResolutionSpatial Resolution: 25 km (Along) x 25 km (Across)
ProjectionType: Swath
Detail: Twin-Swath, each 525 km wide, sub-track (nadir) gap of 725 km
Ellipsoid: GEM6
Latency2 hours
Swath Width1800 km
Sample Frequency-
Temporal Repeat (Nominal)12 Hour
Temporal Repeat (Min)1.7 Hour
Temporal Repeat (Max)5 Day
Platform/Sensor
MetOp-B
Platform
Name: Meteorological Operational Satellite - B (MetOp-B)
Orbit Period: 101.3 minutes
Inclination Angle: 98.7 degrees
Ascending Node: 2012-Oct-29 21:30:00
/
ASCAT
SENSOR
Name: Advanced Scatterometer (ASCAT)
Swath Width: 1800 km
Description: C-band Dual Fan Beam European Scatterometer

ProjectMeteorological Operational (MetOp)
Data ProviderCreator: KNMI
Release Place: PO.DAAC
Release Date: 2013-Jun-03
Resource: http://www.knmi.nl/scatterometer/publications/pdf/ASCAT_Product_Manual.pdf
Keyword(s)wind data, wind, ocean wind, wind speed, vector, vectors, ocean wind vector, ocean wind vectors, knmi, osi saf, eumetsat, metop, metop-b
Persistent IDPODAAC-ASOP2-25B01
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
User's Guide
User's Guidehttp://www.knmi.nl/scatterometer/publications/pdf/ASCAT_Product_Manual.pdf
ASCAT Level 2 User's Guide
Project Materials
Scatterometry Training Materialhttp://www.knmi.nl/scatterometer/training_material/
ASCAT Documentsftp://podaac-ftp.jpl.nasa.gov/allData/ascat/preview/L2/docs/
Calibration, Validation, etc...
KNMI/OSI-SAF Publicationshttp://www.knmi.nl/scatterometer/publications/
Reports and Publications
Additional Sites
MetOp Mission Summary Pagehttp://podaac.jpl.nasa.gov/MetOp
Mission and Instrument Overview
Known Issues
MetOp-B ASCAT Modifications and Anomalieshttp://www.knmi.nl/scatterometer/ascat_b_osi_25_prod/ascat_app.cgi#modifications
History of Reported Modifications, Anomalies, etc...
Datagapsftp://podaac.jpl.nasa.gov/allData/ascat/preview/L2/metop_b/25km/README.datagap
Historical Listing of Inter-orbit Datagaps
Citation KNMI. 2013. MetOp-B ASCAT Level 2 25.0km Ocean Surface Wind Vectors in Full Orbit Swath. Ver. Operational/Near-Real-Time. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD].

For more information see Data Citations and Acknowledgments.

Journal Reference Verspeek, J. A., A. Stoffelen, M. Portabella, H. Bonekamp, C. Anderson, and J. Figa (2009), Validation and calibration of ASCAT using CMOD5.n, IEEE Trans. Geosci. Remote Sens., 48, 1, 386-395, doi:10.1109/TGRS.2009.2027896.