NOAA CYGNSS Level 2 Science Wind Speed 25-km Product Version 1.1

(CYGNSS_NOAA_L2_SWSP_25KM_V1.1)
8 Publications Cited this Dataset
Citation metrics available for years (2014-2022)
Version1.1
Processing Level2
Start/Stop Date2017-May-01 to 2022-May-28
Short NameCYGNSS_NOAA_L2_SWSP_25KM_V1.1
DescriptionThis dataset contains the Version 1.1 NOAA CYGNSS Level 2 Science Wind Speed Product Version 1.1 which provides the time-tagged and geolocated average wind speed (m/s) in 25x25 kilometer grid cells along the measurement tracks from the Delay Doppler Mapping Instrument (DDMI) aboard the CYGNSS satellite constellation. This version corresponds to the first science-quality release produced by NOAA/NESDIS using a specific geophysical model function (GMF version 1.0) and a track-wise debiasing algorithm as part of the wind speed retrieval process. The reported sample locations are determined by averaging the specular point locations falling within each 25 km grid cell. Only one netCDF data file is produced each day (each file containing data from up to 8 unique CYGNSS spacecraft) with a latency of approximately 6 days (or better) from the last recorded measurement time. Formatting of the data variables and metadata designed to be consistent with the netCDF formatting provided by the legacy CYGNSS mission Level 2 wind speed science data record (SDR).
DOI10.5067/CYGNN-22511
MeasurementSPECTRAL/ENGINEERING > RADAR > RADAR CROSS-SECTION
OCEANS > OCEAN WINDS > SURFACE WINDS
Swath Width25 km
Platform/Sensor
CYGNSS
Platform
Name: Cyclone Global Navigation Satellite System (CYGNSS)
Orbit Period: 94.0 minutes
Inclination Angle: 35.0 degrees
/
DDMI
SENSOR
Name: Delay Doppler Mapping Instrument (DDMI)
Swath Width: 25.0 kilometers
Description: Spacecraft angular distance from orbital plane relative to the Equator.

ProjectCyclone Global Navigation Satellite System (CYGNSS)
Data ProviderPublisher: PO.DAAC
Creator: NOAA/NESDIS/STAR/SOCD
Release Place: PO.DAAC
Release Date: 2020-Sep-28
Resource: https://manati.star.nesdis.noaa.gov/products/CYGNSS.php

FormatnetCDF-4
Keyword(s)noaa, nesdis, star, socd, cygnss, ddm, ddmi, doppler, delay doppler, delay, specular point, wind, winds, wind speed, version 1.1, v1.1
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution
Spatial Resolution: 25000 Meters x 25000 Meters
Temporal Resolution: Hourly - < Daily
 
Coverage
Region: GLOBAL
North Bounding Coordinate: 40 degrees
South Bounding Coordinate: -40 degrees
West Bounding Coordinate: -180 degrees
East Bounding Coordinate: 180 degrees
Time Span: 2017-May-01 to 2022-May-28
Granule Time Span: 2017-May-01 to 2022-May-28
Swath Width: 25 km
 
Projection
Projection Type: Satellite native along-track
Projection Detail: Geolocation information included for each pixel
Ellipsoid: WGS 84
 
NameLong NameUnit
antennaReceive antenna1
azimuth_angleAzimuth angledegree
ddm_channelLevel 1 DDM reflectometry channel
ddm_sample_indexLevel 1 NetCDF sample indices
incidence_angleIncidence angledegree
latLatitudedegrees_north
lonLongitudedegrees_east
nbrcs_meanNormalized BRCS1
nbrcs_mean_correctedCorrected normalized BRCS1
num_ddms_utilizedNumber of DDMs utilized
prn_codeGPS PRN code1
range_corr_gainRange corrected gain1e-27 dBi meter-4
rx_gainRx antenna gaindBi
sampleSample index1
sample_flagsStatus flags for the sample
sample_timeSample timeseconds since 2017-05-01 00:00:02
sc_altSpacecraft altitudemeter
sc_latSubsatellite point latitudedegrees_north
sc_lonSubsatellite point longitudedegrees_east
sc_pitchSpacecraft attitude pitch angleradian
sc_rollSpacecraft attitude roll angleradian
sc_yawSpacecraft attitude yaw angleradian
snrSignal-to-noise ratiodB
spacecraft_numCYGNSS spacecraft number1
sv_numGPS space vehicle number1
track_idTrack ID1
wind_speedRetrieved wind speed using the NOAA GMF v1.0 and the NOAA trackwise debiasing algorithm.m s-1
PUBLICATIONS
  • https://doi.org/10.1175/BAMS-D-18-0337.1
    Ruf, C., S. Asharaf, R. Balasubramaniam, S. Gleason, T. Lang, D. McKague, D. Twigg, and D. Waliser. (2019). In-Orbit Performance of the Constellation of CYGNSS Hurricane Satellites. Bull. Amer. Meteor. Soc., 100, 2009 - 2023, https://doi.org/10.1175/BAMS-D-18-0337.1.
  • https://doi.org/10.1109/IGARSS.2019.8898099
    F. Said, Z. Jelenak, J. Park, S. Soisuvarn and P. S. Chang, "A Track-Wise Wind Retrieval Algorithm for the CYGNSS Mission," IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, Yokohama, Japan, 2019, pp. 8711-8714. doi: 10.1109/IGARSS.2019.8898099
  • https://doi.org/10.1175/BAMS-D-14-00218.1
    Ruf, C., R. Atlas, P. Chang, M. Clarizia, J. Garrison, S. Gleason, S. Katzberg, Z. Jelenak, J. Johnson, S. Majumdar, A. O'Brien, D. Posselt, A. Ridley, R. Rose, V. Zavorotny (2015). New Ocean Winds Satellite Mission to Probe Hurricanes and Tropical Convection. Bull. Amer. Meteor. Soc., doi:10.1175/BAMS-D-14-00218.1.
GENERAL DOCUMENTATION
DATA RECIPE
USER'S GUIDE
DATA CITATION POLICY
Citation is critically important for dataset documentation and discovery. Please cite the data as follows, and cite the reference papers when it is appropriate.
Citation NOAA/NESDIS/STAR/SOCD. 2020. NOAA CYGNSS Level 2 Science Wind Speed 25-km Product Version 1.1. Ver. 1.1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/CYGNN-22511

Download Citation
RIS BIB XML JSON-LD

For more information see Data Citations and Acknowledgments.
Journal Reference Said, F., Jelenak, Z., Park, J., Soisuvarn, S., and Chang, P. S.. 2019. A Track-Wise Wind Retrieval Algorithm for the CYGNSS Mission, IEEE. https://doi.org/10.1109/IGARSS.2019.8898099
VersionDatasetVersion DateStatus
1.2NOAA CYGNSS Level 2 Science Wind Speed 25-km Product Version 1.22022-04-20ACTIVE2022-04-20T14:12:00.000Z
1.1NOAA CYGNSS Level 2 Science Wind Speed 25-km Product Version 1.12021-10-18COMPLETE2021-10-18T18:32:00.000Z