RapidScat Level 2B Climate Ocean Wind Vectors in 12.5km Footprints

RapidScat Level 2B Climate Ocean Wind Vectors in 12.5km Footprints
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DOI10.5067/RSX12-L2C11
Short NameRSCAT_LEVEL_2B_OWV_CLIM_12_V1
DescriptionThis dataset contains the RapidScat Level 2B 12.5km Version 1.0 Climate 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 using the "full aperture" normalized radar cross-section (NRCS, a.k.a. Sigma-0) from the L1B 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 PO.DAAC Drive and OPeNDAP. For data access, please click on the "Data Access" tab above. This climate quality data set differs from the nominal "slice" L2B dataset as follows: 1) it uses full antenna footprint measurements (~20-km) without subdividing by range (~7-km) and 2) the absolute calibration has been modified for the two different low signal-to-noise ratio (SNR) mode data sets: LowSNR1 14 August 2015 to 18 September 2015; LowSNR2 6 October 2015 to 7 February 2016. The above enhancements allow this dataset to provide consistent calibration across all SNR states. Low SNR periods and other key quality control (QC) issues are tracked and kept up-to-date in PO.DAAC Drive at https://podaac-tools.jpl.nasa.gov/drive/files/allData/rapidscat/ancillary/revtime.csv. If you have any questions, please visit our user forums: https://podaac.jpl.nasa.gov/forum/.
Version1.0
Dataset TypeOPEN
MeasurementOceans > Ocean Winds > Surface Winds > Ocean Surface Wind Vectors
Processing Level2
CoverageRegion: Global
Northernmost Latitude: 61 degrees
Southernmost Latitude: -61 degrees
Westernmost Longitude: 0 degrees
Easternmost Longitude: 360 degrees
Time Span: 2014-Oct-03 to 2016-Aug-19
ResolutionSpatial Resolution: 12.5 km (Along) x 12.5 km (Across)
ProjectionType: Swath
Detail: Along-track Grid
Ellipsoid: WGS 84
Latency hours
Swath Width9 m
Sample Frequency89
Temporal Repeat (Nominal)12 Hour
Temporal Repeat (Min)1.5 Hour
Temporal Repeat (Max)3 Day
Platform/Sensor
ISS
Platform
Name: International Space Station (ISS)
Orbit Period: 92.91 minutes
Inclination Angle: 51.65 degrees
Ascending Node: 1970-Jan-01 00:00:00
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RapidScat
SENSOR
Name: Rapid Scatterometer (RapidScat)
Swath Width: 1100 km
Description: The ISS RapidScat instrument is a speedy and cost-effective replacement for NASA's QuikScat Earth satellite, which monitored ocean winds to provide essential measurements used in weather predictions, including hurricane monitoring.

ProjectInternational Space Station Rapid Scatterometer (ISS_RapidScat)
Data ProviderCreator: RapidScat Project
Release Place: PO.DAAC
Release Date: 2016-May-06
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, wind, ocean, ocean wind, ocean winds, ocean surface wind vectors, surface wind vectors, wind speed, wind direction, climate, clim, cdr, climate data record, scatterometer, quikscat, seawinds, l2b, l2, level 2, level 2b, version 1, v1, version 1.0, v1.0, V1.0, 1.0
Persistent IDPODAAC-RSX12-L2C11
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
User's Guide
RapidScat L2B NetCDF Guide Documenthttps://podaac-tools.jpl.nasa.gov/drive/files/allData/rapidscat/L2B12/docs/rscat_l2b_user_guide_v1.pdf
User Guide
Project Materials
ISS-RapidScat Mission Information Pagehttps://winds.jpl.nasa.gov/missions/RapidScat/
Website providing more detailed information about the ISS-RapidScat Mission.
ISS-RapidScat Fact Sheethttp://www.jpl.nasa.gov/news/fact_sheets/issrapidscat_factsheet.pdf
Summary of Facts on the ISS-RapidScat Mission
Additional Sites
eoPortal Directory for ISS-RapidScathttps://directory.eoportal.org/web/eoportal/satellite-missions/i/iss-rapidscat
Detailed background information on the ISS-RapidScat mission published by the eoPortal.
Known Issues
RapidScat Scheduled Outageshttp://manati.star.nesdis.noaa.gov/rscat_images/monitor/RapidScat_Scheduled_Outages.txt
Text file containing reverse chronological list of future scheduled outages and past outages. A start/stop date/time and description is provided for each outage. This list is maintained by NOAA/NESDIS to service near-real-time data users.
revtime.csvhttps://podaac-tools.jpl.nasa.gov/drive/files/allData/rapidscat/ancillary/revtime.csv
ASCII CSV orbital revolution time tables with quality assurance information.
Citation RapidScat Project. 2016. RapidScat Level 2B Climate Ocean Wind Vectors in 12.5km Footprints. Ver. 1.0. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/RSX12-L2C11.

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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, with the addition of utilizing the full aperture NRCS data.]