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Description

This dataset contains the curl and divergence of ocean surface equivalent neutral wind and wind stress, derived from satellite-based scatterometer observations aboard SCATSAT-1, representing the first science quality release of these data funded under the MEaSUREs program. This product from SCATSAT-1 has been intercalibrated with similar scatterometer measurements from instruments on the MetOp-A, MetOp-B, and QuikScat satellites, all of which can be found on the MEaSUREs OSVW Project Page. These Level 2 data are provided on a non-uniform grid within the satellite swath at ~12.5 km pixel resolution. Each L2 file corresponds to a specific orbital revolution number, which begins at the southernmost point of the ascending orbit. There are typically 14 orbits per day, and the thumbnail preview shows coverage for the first ten orbits in an example day. Estimates for the curls and divergences are computed over several spatial domains with varying radii from the point of interest, and included as separate variables.

The dataset represents the first science quality release funded under the MEaSUREs (Making Earth System Data Records for Use in Research Environments) program. The primary purpose of this release is for science evaluation by the NASA International Ocean Vector Winds Science Team (IOVWST). This V1.0 of the data was derived from V1.1 of the L2 wind and stress product.

Product Summary

Platforms
SCATSAT-1
Instruments
OSCAT-2
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
12.5 Kilometers x 12.5 Kilometers
Location
GLOBAL
Coordinate System
GEODETIC
Granule Spatial Representation
GEODETIC
Temporal Extent
2018-04-01 to 2021-03-01
Data Partner
Jet Propulsion Laboratory, NASA (NASA/JPL) ,
Physical Oceanography Distributed Active Archive Center, Jet Propulsion Laboratory, NASA (NASA/JPL/PODAAC)
Concept ID
C3401797730-POCLOUD
Data State
COMPLETE
Number of Files/Granules
13145
Processing Level
2
Science Keywords
Convergence/Divergence ,
Vorticity

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

NASA/JPL. (2025). SCATSAT-1 Inter-Calibrated ESDR Level 2 Observed and Modeled Spatial Derivatives of Surface Wind and Wind Stress Version 1.0 [Data set]. NASA Physical Oceanography Distributed Active Archive Center. https://doi.org/10.5067/ESDSS-L2WD10 Date Accessed: 2026-04-12

Documents

Variables

The table below lists the variables contained within a single granule for this dataset. Variables often contain observed or derived geophysical measurements collected from a variety of sources, including remote sensing instruments on satellite and airborne platforms, field campaigns, in situ measurements, and model outputs. The terms variable, parameter, scientific data set, layer, and band have been used across NASA’s Earth science disciplines; however, variable is the designated nomenclature in NASA’s Common Metadata Repository (CMR). Variable metadata attributes such as Name, Description, Units, Data Type, Fill Value, Valid Range, and Scale Factor allow users to efficiently process and analyze the data. The full range of attributes may not be applicable to all variables. Additional information on variable attributes is typically available in the data, user guide, and/or other product documentation.

For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor Offset
en_wind_curl_res12 Winds used are Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
en_wind_curl_res25 Winds used are Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
en_wind_curl_res50 Winds used are Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
en_wind_curl_res75 Winds used are Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
en_wind_divergence_res12 Winds used are Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
en_wind_divergence_res25 Winds used are Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
en_wind_divergence_res50 Winds used are Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
en_wind_divergence_res75 Winds used are Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
era_en_wind_curl_res12 Winds used are ERA5 forecast Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
era_en_wind_curl_res25 Winds used are ERA5 forecast Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
era_en_wind_divergence_res12 Winds used are ERA5 forecast Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
era_en_wind_divergence_res25 Winds used are ERA5 forecast Equivalent Neutral calibrated to the 10 meter reference height s-1 float -9999 -1 to 1 1 N/A
era_stress_curl_res12 ERA5 forecast instantaneous turbulent wind stress magnitude used is computed from the instantaneous eastward and northward turbulent surface stress components N m-3 float -9999 -1 to 1 1 N/A
era_stress_curl_res25 ERA5 forecast instantaneous turbulent wind stress magnitude used is computed from the instantaneous eastward and northward turbulent surface stress components N m-3 float -9999 -1 to 1 1 N/A
era_stress_divergence_res12 ERA5 forecast instantaneous turbulent wind stress magnitude used is computed from the instantaneous eastward and northward turbulent surface stress components N m-3 float -9999 -1 to 1 1 N/A
era_stress_divergence_res25 ERA5 forecast instantaneous turbulent wind stress magnitude used is computed from the instantaneous eastward and northward turbulent surface stress components N m-3 float -9999 -1 to 1 1 N/A
lat_res12 derivative latitude over approximate 12.5 km diameter region degrees_north float N/A -90 to 90 1 N/A
lat_res25 derivative latitude over approximate 25 km diameter region degrees_north float N/A -90 to 90 1 N/A
lat_res50 derivative latitude over approximate 50 km diameter region degrees_north float N/A -90 to 90 1 N/A
lat_res75 derivative latitude over approximate 75 km diameter region degrees_north float N/A -90 to 90 1 N/A
lon_res12 derivative longitude over approximate 12.5 km diameter region degrees_east float N/A 0 to 360 1 N/A
lon_res25 derivative longitude over approximate 25 km diameter region degrees_east float N/A 0 to 360 1 N/A
lon_res50 derivative longitude over approximate 50 km diameter region degrees_east float N/A 0 to 360 1 N/A
lon_res75 derivative longitude over approximate 75 km diameter region degrees_east float N/A 0 to 360 1 N/A
stress_curl_res12 Wind stress magnitude used is computed from the Equivalent Neutral wind speed using the bulk parameterization from de Kloe et al. 2017 N m-3 float -9999 -1 to 1 1 N/A
stress_curl_res25 Wind stress magnitude used is computed from the Equivalent Neutral wind speed using the bulk parameterization from de Kloe et al. 2017 N m-3 float -9999 -1 to 1 1 N/A
stress_curl_res50 Wind stress magnitude used is computed from the Equivalent Neutral wind speed using the bulk parameterization from de Kloe et al. 2017 N m-3 float -9999 -1 to 1 1 N/A
stress_curl_res75 Wind stress magnitude used is computed from the Equivalent Neutral wind speed using the bulk parameterization from de Kloe et al. 2017 N m-3 float -9999 -1 to 1 1 N/A
stress_divergence_res12 Wind stress magnitude used is computed from the Equivalent Neutral wind speed using the bulk parameterization from de Kloe et al. 2017 N m-3 float -9999 -1 to 1 1 N/A
stress_divergence_res25 Wind stress magnitude used is computed from the Equivalent Neutral wind speed using the bulk parameterization from de Kloe et al. 2017 N m-3 float -9999 -1 to 1 1 N/A
stress_divergence_res50 Wind stress magnitude used is computed from the Equivalent Neutral wind speed using the bulk parameterization from de Kloe et al. 2017 N m-3 float -9999 -1 to 1 1 N/A
stress_divergence_res75 Wind stress magnitude used is computed from the Equivalent Neutral wind speed using the bulk parameterization from de Kloe et al. 2017 N m-3 float -9999 -1 to 1 1 N/A
time date and time seconds since 1999-01-01 float N/A N/A 1 N/A
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