MetOp-A ASCAT Level 2 25-km Ocean Surface Wind Vector Climate Data Record
(ASCATA_L2_25KM_CDR)| Version | 1.0 |
| Processing Level | 2 |
| Start/Stop Date | 2007-Jan-01 to 2014-Apr-01 |
| Short Name | ASCATA_L2_25KM_CDR |
| Description | This dataset represents the first historically reprocessed Level 2 ocean surface wind vector climate data record from the Advanced Scatterometer (ASCAT) on MetOp-A sampled on a 25 km grid. Products at 25-km sampling are less noisy than 12.5-km products, but also contain less geophysical information on small scales and near the coasts. The wind vector retrievals are currently processed using the CMOD7 geophysical model function using a Hamming filter to spatially average the Level 1 Sigma-0 data over 25 km swath grid cells. Each file corresponds to one complete orbit and is provided in netCDF version 3 format. The beginning of the orbit files is defined near the South Pole. ASCAT is a C-band fan beam radar scatterometer, providing two independent swaths of backscatter retrievals, aboard the MetOp-A platform in sun-synchronous polar orbit. 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). For more information on the MetOp mission, please visit: https://www.eumetsat.int/our-satellites/metop-series . For access to more contemporaneous and near-real-time MetOp-A ASCAT 25-km data, please visit: https://podaac.jpl.nasa.gov/dataset/ASCATA-L2-25km. For more timely announcements, users are encouraged to register with the KNMI scatterometer email list: scat@knmi.nl. 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. Use cases and feedback on the products will be much appreciated and in fact helps to sustain the reprocessing capability. |
| DOI | 10.15770/EUM_SAF_OSI_0006 |
| Measurement | OCEANS > OCEAN WINDS > SURFACE WINDS |
| Swath Width | 1800 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. |
| Project | Meteorological Operational (MetOp) |
| Data Provider | Publisher: KNMI Creator: EUMETSAT/OSI SAF Release Place: KNMI, Royal Netherlands Meteorological Institute Release Date: 2018-Apr-23 Resource: https://scatterometer.knmi.nl/ascat_cdr/ |
| Format | netCDF-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, climate, climate data record, cdr |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution Spatial Resolution: 25 Kilometers x 25 Kilometers Temporal Resolution: 12 Hour Coverage Region: GLOBAL North Bounding Coordinate: 89.6 degrees South Bounding Coordinate: -89.6 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 2007-Jan-01 to 2014-Apr-01 Granule Time Span: 2007-Jan-01 to 2014-Apr-01Swath Width: 1800 km |
| DIRECT ACCESS | |
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| Available for access in-region with AWS Cloud | |
Region | |
| us-west-2 | |
| podaac-ops-cumulus-protected/ASCATA_L2_25KM_CDR/ | |
| podaac-ops-cumulus-public/ASCATA_L2_25KM_CDR/ | |
AWS S3 Credentials | |
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| Name | Long Name | Unit |
|---|---|---|
| bs_distance | backscatter distance | 1 |
| ice_age | ice age (a-parameter) | dB |
| ice_prob | ice probability | 1 |
| lat | latitude | degrees_north |
| lon | longitude | degrees_east |
| model_dir | model wind direction at 10 m | degree |
| model_speed | model wind speed at 10 m | m s-1 |
| time | time | seconds since 1990-01-01 00:00:00 |
| wind_dir | wind direction at 10 m | degree |
| wind_speed | wind speed at 10 m | m s-1 |
| wvc_index | cross track wind vector cell number | 1 |
| wvc_quality_flag | wind vector cell quality |
| USER'S GUIDE | |
| GENERAL DOCUMENTATION | |
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| READ-ME | |
| DATA CITATION POLICY | |
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| DATA RECIPE | |
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Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
| Citation | EUMETSAT/OSI SAF. 2018. MetOp-A ASCAT Level 2 25-km Ocean Surface Wind Vector Climate Data Record. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.15770/EUM_SAF_OSI_0006
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Verhoef, A., J. Vogelzang, J. Verspeek and A. Stoffelen, Long-Term Scatterometer Wind Climate Data Records, IEEE Journal of Selected Topics in Applied Earth O, 2017, 10, 5, 2186-2194, doi:10.1109/JSTARS.2016.2615873. . |
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