MetOp-A ASCAT Level 2 Ocean Surface Wind Vectors Optimized for Coastal Ocean

(ASCATA-L2-Coastal)
18 Publications Cited this Dataset
Citation metrics available for years (2014-2020)
VersionOperational/Near-Real-Time
Processing Level2
Start/Stop Date2010-Aug-18 to 2021-Nov-15
Short NameASCATA-L2-Coastal
DescriptionThis dataset contains operational near-real-time Level 2 coastal ocean surface wind vector retrievals from the Advanced Scatterometer (ASCAT) on MetOp-A at 12.5 km sampling resolution (note: the effective resolution is 25 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). This coastal dataset differs from the standard 25 km datasets in that it utilizes a spatial box filter (rather than the Hamming filter) to generate a spatial average of the Sigma-0 retrievals from the Level 1B dataset; all full resolution Sigma-0 retrievals within a 15 km radius of the wind vector cell centroid are used in the averaging. Since the full resolution L1B Sigma-0 retrievals are used, all non-sea retrievals are discarded prior to the Sigma-0 averaging. Each box average Sigma-0 is then used to compute the wind vector cell using the same CMOD7.n geophysical model function as in the standard OSI SAF ASCAT wind vector datasets. With this enhanced coastal retrieval, winds can be computed as close to ~15 km from the coast, as compared to the static ~35 km land mask in the standard 12.5 km dataset. 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 fan beam radar scatterometer providing two independent swaths of backscatter retrievals in sun-synchronous polar orbit aboard the MetOp-A platform. For more information on the MetOp mission, please visit: https://www.eumetsat.int/our-satellites/metop-series . 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.
DOINot Registered
MeasurementOCEANS > OCEAN WINDS > SURFACE WINDS
Swath Width1800 km
Platform/Sensor
METOP-A
Platform
Name: Meteorological Operational Satellite - A (METOP-A)
Orbit Period: 101.3 minutes
Inclination Angle: 98.7 degrees
/
ASCAT
SENSOR
Name: Advanced Scatterometer (ASCAT)
Swath Width: 1800.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectMeteorological Operational (MetOp)
Data ProviderPublisher: KNMI
Creator: EUMETSAT/OSI SAF
Release Place: KNMI, Royal Netherlands Meteorological Institute
Release Date: 2010-May-24
Resource: https://scatterometer.knmi.nl/publications/pdf/ASCAT_Product_Manual.pdf

FormatnetCDF-4
Keyword(s)metop-a, metop, wind data, wind, ocean wind, wind speed, vector, vectors, ocean wind vector, ocean wind vectors, knmi, osi saf, eumetsat
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution
Spatial Resolution: 12.5 km (Along) x 12.5 km (Across)
Temporal Resolution: Hourly - < Daily
 
Coverage
Region: GLOBAL OCEAN
North Bounding Coordinate: 89.6 degrees
South Bounding Coordinate: -89.6 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2010-Aug-18 to 2021-Nov-15
Granule Time Span: 2010-Aug-18 to 2021-Nov-15
Swath Width: 1800 km
 
Projection
Projection Type: Satellite native swath
Projection Detail: Geolocation information included for each pixel
Ellipsoid: WGS 84
 
GENERAL DOCUMENTATION
DATA RECIPE
ANOMALIES
USER'S GUIDE
DATA CITATION POLICY
Citation EUMETSAT/OSI SAF. 2010. MetOp-A ASCAT Level 2 Ocean Surface Wind Vectors Optimized for Coastal Ocean. Ver. Operational/Near-Real-Time. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/

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For more information see Data Citations and Acknowledgments.

Journal Reference Verhoef, A. and Stoffelen, A.. 2013. Validation of ASCAT coastal winds, EUMETSAT, SAF/OSI/CDOP/KNMI/TEC/RP/176.