
RapidScat Level 2A Surface Flagged Sigma-0 and Attenuations in 12.5Km Swath Grid Version 1.1
(RSCAT_L2A_12KM_V1.1)DOI | 10.5067/RSX12-L2A01 |
Short Name | RSCAT_L2A_12KM_V1.1 |
Description | This dataset contains the ISS-RapidScat on Level 2A 12.5 km science data record, which provides surface-flagged sigma-0 in 12.5 km Wind Vector Cells processed using the pulse "slice" Sigma-0 data provided by the Level 1B dataset. Due to the circular scan of the RapidScat instrument the expected number of Sigma-0 cells per WVC is not constant. To minimize the L2A data volume, the Sigma-0 cell data are stored as "lists" for each WVC row, with each list indexed by a "cell_index" array to indicate the cross-track WVC membership of the data. Each cell is then checked for land or ice and flagged accordingly. Attenuation corrections for each Sigma-0 measurement are also provided. Data are provided in single-orbit files in HDF-4 format. 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. |
Version | 1.1 |
Dataset Type | COMPLETE |
Measurement | SPECTRAL/ENGINEERING > RADAR > SIGMA NAUGHT |
Processing Level | 2A |
Coverage | Region: GLOBAL North Bounding Coordinate: 61 degrees South Bounding Coordinate: -61 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 2014-Oct-03 to 2016-Mar-10 Granule Time Span: 2014-Oct-03 to 2016-Mar-10 |
Resolution | Spatial Resolution: 12.5 km (Along) x 12.5 km (Across) |
Projection | Ellipsoid: WGS 84 |
Swath Width | 900 km |
Platform/Sensor | ISS / Platform Name: International Space Station (ISS) Orbit Period: 92.91 minutes Inclination Angle: 51.65 degrees RapidScat SENSOR Name: Rapid Scatterometer (RapidScat) Swath Width: 1100.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. |
Project | International Space Station Rapid Scatterometer (ISS_RapidScat) |
Data Provider | Publisher: PO.DAAC Creator: RapidScat Project Release Place: PO.DAAC Release Date: 2015-Aug-19 Resource: http://www.jpl.nasa.gov/news/fact_sheets/issrapidscat_factsheet.pdf |
Keyword(s) | international space station, space station, iss, rapidscat, rscat, iss-rapidscat, winds, radar, ocean, roughness, ocean roughness, backscatter, normalized radar cross-section, normalized radar cross section, nrcs, dB, sigma-0, sigma0, sigma naught, scatterometer, seawinds, l2a, l2, level 2, level 2a, 12.5 km, 12.5-km, 12.5, version 1, v1, version 1.1, v1.1, V1.1, 1.1 |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
DIRECT ACCESS | |
PO.DAAC DRIVE | https://podaac-tools.jpl.nasa.gov/drive/files/allData/rapidscat/L2A/12km/v1.1 PO.DAAC Drive |
OPENDAP DATA | https://podaac-opendap.jpl.nasa.gov/opendap/allData/rapidscat/L2A/12km/v1.1/ The OPeNDAP base directory location for the collection. |
Format | HDF |
ANOMALIES | |
| |
GENERAL DOCUMENTATION | |
| |
| |
DATA CITATION POLICY | |
|
Citation | RapidScat Project. 2015. RapidScat Level 2A Surface Flagged Sigma-0 and Attenuations in 12.5Km Swath Grid Version 1.1. Ver. 1.1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/RSX12-L2A01
For more information see Data Citations and Acknowledgments.
|
|||||||
Journal Reference | Fore, A.G., Stiles, B.W., Chau, A.H., Williams, B.A., Dunbar, R. S., Rodriguez E., 2013: Point-wise Wind Retrieval and Ambiguity Removal Improvements for the QuikSCAT Climatological Data Set. IEEE Trans. Geoscience and Remote Sensing, doi:10.1109/TGRS.2012.2235843. [Special Note: This paper describes the wind retrieval algorithm used to process the QuikSCAT version 3 wind product. The RapidScat data was processed using the same technique.] . |
Version | Dataset | Version Date | Status | |
---|---|---|---|---|
1.1 | RapidScat Level 2A Surface Flagged Sigma-0 and Attenuations in 12.5Km Swath Grid Version 1.1 | 2015-03-26 | COMPLETE | 2015-03-26T20:42:56.957Z |
1.2 | RapidScat Level 2A Surface Flagged Sigma-0 and Attenuations in 12.5Km Swath Grid Version 1.2 | 2016-04-19 | COMPLETE | 2016-04-19T00:43:41.149Z |
1.3 | RapidScat Level 2A Surface Flagged Sigma-0 and Attenuations in 12.5Km Swath Grid Version 1.3 | 2016-09-28 | COMPLETE | 2016-09-28T01:46:00.259Z |