SeaWinds on QuikSCAT Level 2A Surface Flagged Sigma0 and Attenuations in 25Km Swath Grid Version 2
This dataset will be available through Earthdata Cloud only, starting June 6th 2022. Learn More
AWS Calendar Icon
3 Publications Cited this Dataset
Citation metrics available for years (2014-2019)
DOI10.5067/QSX25-L2A02
Short NameQSCAT_LEVEL_2A_V2
DescriptionThe SeaWinds on QuikSCAT Level 2A Surface-flagged Sigma-0 in 25km Wind Vector Cells are processed using the pulse Sigma-0 data provided by the Level 1B product. Unlike NSCAT, the expected number of Sigma-0 cells per WVC is not constant, due to the circular scan of the SeaWinds instrument. 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. Quality Assurance files are also included to verify the quality of the L2A processing. Data are provided in single-orbit files. Special note: QuikSCAT went into a "non-spinning" mode on 22 November 2009. The final rev number in the nominal Operational "spinning" mode is 54296; the "non-spinning" mode of the instrument continued predominantly for the remainder of QuikSCAT operations. There were some brief periods of "spinning" in year 2013, which include the following days and rev numbers (identified in parenthesis): 1) 29 January to 5 February (7909-71011), 2) 14 March (71536-71549), 3) 18 March to 21 March (71590-71634), and 4) 28 March to 31 March (71735-71769).
Version2
Dataset TypeCOMPLETE
MeasurementSPECTRAL/ENGINEERING > RADAR > SIGMA NAUGHT
Processing Level2A
CoverageRegion: GLOBAL
North Bounding Coordinate: 90 degrees
South Bounding Coordinate: -90 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 1999-Jul-19 to 2013-Mar-31
ResolutionSpatial Resolution: 25 km (Along) x 25 km (Across)
ProjectionEllipsoid: WGS 84
Swath Width1800 km
Platform/Sensor
QUIKSCAT
Platform
Name: QUIKSCAT (QUIKSCAT)
Orbit Period: 100.93 minutes
Inclination Angle: 98.6 degrees
/
SEAWINDS
SENSOR
Name: SeaWinds Scatterometer (SEAWINDS)
Swath Width: 1800.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectEarth Observing System Data Information System (EOSDIS)
Data ProviderPublisher: PO.DAAC
Creator: JPL QuikSCAT Project
Release Place: PO.DAAC
Release Date: 2006-Jul-19
Resource: https://podaac-tools.jpl.nasa.gov/drive/files/allData/quikscat/L2A/v2/docs/QSUG_v3.pdf

Keyword(s)ocean, roughness, ocean roughness, winds, radar, backscatter, normalized radar cross-section, normalized radar cross section, nrcs, sigma-0, sigma0, sigma naught, dB, L2A, level 2A, 25, 25-km, 25 km, scatterometer, quikscat, qscat, seawinds
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Direct Access
PO.DAAC DRIVEhttps://podaac-tools.jpl.nasa.gov/drive/files/allData/quikscat/L2A/v2
PO.DAAC Drive
OPENDAP DATAhttps://podaac-opendap.jpl.nasa.gov/opendap/allData/quikscat/L2A/v2/
The OPeNDAP base directory location for the collection.
Format (Compression)HDF
Read Software
USER'S GUIDE
ANOMALIES
DATA CITATION POLICY
Citation JPL QuikSCAT Project. 2006. SeaWinds on QuikSCAT Level 2A Surface Flagged Sigma0 and Attenuations in 25Km Swath Grid Version 2. Ver. 2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/QSX25-L2A02

Download Citation
RIS XML JSON-LD

For more information see Data Citations and Acknowledgments.

Journal Reference