This dataset contains the RapidScat Level 2B 12.5km Version 1.1 science-quality ocean surface wind vectors. The Level 2B wind vectors are binned on a 12.5 km Wind Vector Cell (WVC) grid and processed using the Level 2A Sigma-0 dataset. RapidScat is a Ku-band dual beam circular rotating scatterometer retaining much of the same hardware and functionality of QuikSCAT, with exception of the antenna sub-system and digital interface to the International Space Station (ISS) Columbus module, which is where RapidScat is mounted. The NASA mission is officially referred to as ISS-RapidScat. Unlike QuikSCAT, ISS-RapidScat is not in sun-synchronous orbit, and flies at roughly half the altitude with a low inclination angle that restricts data coverage to the tropics and mid-latitude regions; the extent of latitudinal coverage stretches from approximately 61 degrees North to 61 degrees South. Furthermore, there is no consistent local time of day retrieval. This dataset is provided in a netCDF-3 file format that follows the netCDF-4 classic model (i.e., generated by the netCDF-4 API) and made available via FTP and OPeNDAP. For data access, please click on the "Data Access" tab above. This Version 1.1 dataset differs from the previous Version 1 dataset as follows: 1) A new neural network approach for high wind speeds provided rain corrections for the "retrieve_wind_speed" variable for wind speeds in excess of 15 m/s. 2) The data variables containing the number of measurements of each type for each wind vector cell have been corrected; these variables include "number_in_aft", "number_in_fore", "number_out_aft", and "number_out_fore". 3) The "wind_obj" data variable has been corrected to include the proper data for the conditional probability for the objective DIRTH function values. It is advised for users to avoid using the "wind_obj" variable in this dataset since it is minimally applicable and meant primarily for quality assurance; for users who wish to access the objective function values for each ambiguity, it is suggested to use only the "ambiguity_obj" variable. The "wind_obj" variable contains DIRTH probabilities (which are derived form the "ambiguity_obj" objective function values) in the range of 0 to 1 indicating the conditional probability that the true direction is within + or - 2.5 degrees of the retrieved wind direction given the observed backscatter measurements in the cell. If you have any questions, please contact podaac@podaac.jpl.nasa.gov
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Spatial Extent: | Bounding Rectangle: N: 61 S: -61 E: 180 W: -180 |
Data Format(s): | Distribution: NETCDF |
Temporal Extent: | Platform(s): | ISS | |
Data Center(s): | NASA/JPL/PODAAC, NASA/JPL/PODAAC | Instrument(s): | RapidScat |
Version: | 1.1 |
10.5067/RSX12-L2B11
https://dx.doi.org/
Creation | |
Last Revision |
2
Complete
Title: Publication reference title not provided
Project Short Name | Campaigns | Project Dates |
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ISS_RapidScat | No campaigns listed. | No dates provided. |
Coverage Type | Zone Identifier | Geometry | Granule Representation |
---|---|---|---|
HORIZONTAL | CARTESIAN | CARTESIAN |
Projection Type: Swath, Projection Detail: Along-track Grid
Geodetic Model:
Datum Name | Ellipsoid Name | Semi Major Axis | Flattening Ratio Denominator |
---|---|---|---|
World Geodetic System 1984 | WGS 84 | 6378137 | 298.2572236 |
12500 Meters
12500 Meters
Coverage Type | Swath Width | Period | Inclination Angle | Number of Orbits | Start Circular Latitude | Granule Representation |
---|---|---|---|---|---|---|
ORBITAL | 900.0 | 92.91 | 51.65 | 1 | CARTESIAN |
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Format: NETCDF
Format Type: Native