NOAA high resolution sea surface winds data from Synthetic Aperture Radar (SAR) on the Sentinel-1 satellites

This data set consists of high resolution sea surface winds data produced from Synthetic Aperture Radar (SAR) on board Sentinel-1A and Sentinel-1B satellites. This product utilizes the CoastWatch product format and the basic archive file is a NetCDF-4 file containing SAR wind, land mask, and time and earth location information. Also archived are maps of the SAR winds in GeoTIFF format. The product covers the geographic extent of the SAR image frame from which it was derived. These SAR-derived high resolution wind products are calculated from high resolution SAR images of normalized radar cross section (NRCS) of the Earth's surface. Backscattered microwave radar returns from the ocean surface are strongly dependent on wind speed and direction. When no wind is present, the surface of the water is smooth, almost glass-like. Radar energy will largely be reflected away and the radar cross section will be low. As the wind begins to blow, the surface roughens and surface waves begin to develop. As the wind continues to blow more strongly, the amplitude of the wave increases, thus, roughening the surface more. As the surface roughness increases, more energy is backscattered and NRCS increases. Moreover, careful examination of the wind-generated waves reveals that these surface wave crests are generally aligned perpendicular to the prevailing wind direction, suggesting a dependence of backscatter on the relative direction between the incident radar energy and the wind direction.

Data and Resources

Additional Info

Field Value
Last Updated August 6, 2019, 05:27
Created October 24, 2018, 13:41
access_constraints ["Cite as: Monaldo, Francis M.; Jackson, Christopher R.; Li, Xiaofeng; Pichel, William G.; Sapper, John; Hatteberg, Rachel (2016). NOAA high resolution sea surface winds data from Synthetic Aperture Radar (SAR) on the Sentinel-1 satellites. [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. Accessed [date].", "Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose."]
bbox-east-long -16
bbox-north-lat 90
bbox-south-lat -90
bbox-west-long -180
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "2016-11-16"}, {"type": "revision", "value": "2019-08-05"}]
frequency-of-update asNeeded
graphic-preview-description Preview graphic
graphic-preview-type PNG
guid gov.noaa.nodc:SAR-WINDS-S1
licence ["accessLevel: Public"]
metadata-date 2019-08-05T19:41:13Z
metadata-language eng
progress onGoing
resource-type series
responsible-party [{"name": "", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-180.0, -90.0], [-16.0, -90.0], [-16.0, 90.0], [-180.0, 90.0], [-180.0, -90.0]]]}
spatial_harvester true
temporal-extent-begin 2016-09-01