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| DOI | 10.5067/SEA12-L2B00 |
| Short Name | SEAWINDS_LEVEL_2B_COMP_12 |
| Description | This dataset contains Level 2B science-quality ocean surface wind vector retrievals from the SeaWinds on ADEOS-II scatterometer. The retrievals are provided on a non-uniform grid within the swath at 12.5 km pixel resolution. Higher resolution is achieved through a slice composite technique in which high resolution slice measurements from L1B data are composited into a 12.5 km wind vector cell. The increased sampling resolution enables users to obtain wind vectors 10 km closer to shore when compared to the 25 km L2B dataset. Each L2B file corresponds to a specific orbital revolution (rev) number, which begins at the southernmost point of the ascending orbit. The granule metadata is consistent with the QuikSCAT L2B dataset, with exception of the amsr_rain_indicator provided by the Advanced Microwave Scanning Radiometer (AMSR) instrument aboard the ADEOS-II spacecraft. Also, the wvc_quality_flag utilizes bits 2-6 for AMSR-related data quality assessment; these bits are left empty in the QuikSCAT L2B wvc_quality_flag variable. An ASCII inline quality report (Q2B) has been generated for each L2B file; each Q2B file provides statistics of various quality elements pertaining to the processing of a specific L2B file. This is the official dataset produced by the QuikSCAT Project through the SeaWinds Processing and Analysis Center (SeaPAC). |
| Version | 1 |
| Dataset Type | OPEN |
| Measurement | OCEANS > OCEAN WINDS > SURFACE WINDS > Ocean Surface Wind Vectors |
| Processing Level | 2 |
| Coverage | Region: Global Northernmost Latitude: 90 degrees Southernmost Latitude: -90 degrees Westernmost Longitude: 0 degrees Easternmost Longitude: 360 degrees Time Span: 2003-Apr-10 to 2003-Oct-24 |
| Resolution | Spatial Resolution: 12.5 km (Along) x 12.5 km (Across) |
| Projection | Type: Swath Detail: Along-track Grid Ellipsoid: WGS 84 |
| Latency | hours |
| Swath Width | 1800000 m |
| Sample Frequency | - |
| Temporal Repeat (Nominal) | 12 Hour |
| Temporal Repeat (Min) | 1.7 Hour |
| Temporal Repeat (Max) | 4 Day |
| Platform/Sensor | ADEOS-II / Platform Name: Advanced Earth Observing Satellite-II (ADEOS-II) Orbit Period: 101.05 minutes Inclination Angle: 98.62 degrees Ascending Node: 2003-Apr-09 22:33:33 SEAWINDS SENSOR Name: SeaWinds Scatterometer (SEAWINDS) Swath Width: 1800 km Description: SeaWinds is a Ku-band (13.4 GHz) Scatterometer which features a single circular scanning dish antenna to provide pencil-beam measurements, as opposed to the common fan beam design as seen with other spaceborne scatterometers. The pencil-beam design has several key advantages over the more common fan beam design: higher signal-to-noise ratio, smaller size, and superior coverage. The SeaWinds single antenna utilizes twin offset feeds, thus providing two pencil-beam footprint paths with an elliptical sampling footprint of approximately 25 km (in azimuth) by 37 km (in look/range direction); these pencil beams have opposing polarizations (i.e., vertical and horizontal), thus achieving dual-polarization. The SeaWinds instrument provides a full 1800 km-wide swath coverage (including the nadir region), which allows for a nominal daily measurement coverage of 90% over the ice-free oceans. |
| Project | SeaWinds on ADEOS-II (SEAWINDS) |
| Data Provider | Creator: SeaPAC Release Place: PO.DAAC Release Date: 2006-Aug-03 Resource: https://podaac-tools.jpl.nasa.gov/drive/files/allData/seawinds/L2B12/docs/SWS_SDPUG_V2.0.pdf |
| Keyword(s) | wind data, wind, ocean wind, wind speed, vector, vectors, ocean wind vector, ocean wind vectors, seawinds, adeos-2, adeos-ii, scatterometer, l2b |
| Persistent ID | PODAAC-SEA12-L2B00 |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
| PO.DAAC DRIVE | https://podaac-tools.jpl.nasa.gov/drive/files/allData/seawinds/L2B12 |
| OPENDAP | https://podaac-opendap.jpl.nasa.gov/opendap/allData/seawinds/L2B12/ |
| Format (Compression) | HDF (GZIP) |
| Citation | SeaPAC. 2006. SeaWinds on ADEOS-II Level 2B Ocean Wind Vectors in 12.5km Slice Composites. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SEA12-L2B00.
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Lungu, T., July 2006. SeaWinds Science Data Product User Manual. Version 2.0, JPL Document D-21551 - Version 2, Jet Propulsion Laboratory, Pasadena, CA. | |||||||
