S-MODE DopplerScatt Level 2 Ocean Winds and Currents Version 2
(SMODE_L2_DOPPLERSCATT_WINDS_CURRENT_V2)| Version | 2 |
| Processing Level | 2 |
| Start/Stop Date | 2021-Oct-20 to 2023-Apr-30 |
| Short Name | SMODE_L2_DOPPLERSCATT_WINDS_CURRENT_V2 |
| Description | This dataset contains concurrent airborne DopplerScatt radar retrievals of surface vector winds and ocean currents from the Sub-Mesoscale Ocean Dynamics Experiment (S-MODE). S-MODE aims to understand how ocean dynamics acting on short spatial scales influence the vertical exchange of physical and biological variables in the ocean. Data were collected approximately 300 km offshore of San Fransisco during a pilot campaign in October 2021, and two intensive operating periods (IOPs) in Fall 2022 and Spring 2023. DopplerScatt is a Ka-band (35.75 GHz) scatterometer with a swath width of 24 km that records Doppler measurements of the relative velocity between the platform and the surface. It is mounted on a B200 aircraft which flies daily surveys of the field domain during deployments, and data is used to give larger scale context, and also to compare with in-situ measurements of velocities and divergence. Level 2 data includes estimates of surface winds and currents. The V2 data have been cross-calibrated against ADCPs, surface drifters, and the SIO-DopVis instrument collected during the Pilot and IOP1 campaigns. Additional DopVis data collected during IOP1 and IOP2, in addition to IOP2 ADCP and surface drifter data will lead to a reprocessing of this dataset, and it should be regarded as provisional. Data are available in netCDF format. |
| DOI | 10.5067/SMODE-DSCT2-V2 |
| Measurement | ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS OCEANS > OCEAN CIRCULATION > OCEAN CURRENTS SPECTRAL/ENGINEERING > RADAR > DOPPLER VELOCITY |
| Platform/Sensor | B-200 / Platform Name: Beechcraft King Air B-200 (B-200) DOPPLER RADAR SENSOR Name: DOPPLER RADAR (DOPPLER RADAR) |
| Project | Sub-Mesoscale Ocean Dynamics Experiment (S-MODE) |
| Data Provider | Publisher: S-MODE Project Data Manager, Frederick Bingham Creator: E. Rodriguez, A. Wineteer, T. Gal, D. Perkovic-Martin, H. Torres, G. Gunther Release Date: 2023-May-30 Resource: http://podaac.jpl.nasa.gov/S-MODE |
| Format | netCDF-4 |
| Keyword(s) | S-MODE, Sub-Mesoscale Ocean Dynamics Experiment, earth science, atmosphere, atmospheric winds, surface winds, oceans, ocean circulation, ocean currents, spectral/engineering, radar, doppler velocity, dopplerscatt, airborne, scatterometer |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Resolution Temporal Resolution: 1 second - < 1 minute Coverage Region: PACIFIC OCEAN North Bounding Coordinate: 38.4 degrees South Bounding Coordinate: 36 degrees West Bounding Coordinate: -126.5 degrees East Bounding Coordinate: -122 degrees Time Span: 2021-Oct-20 to 2023-Apr-30 Projection Projection Type: Universal Transverse Mercator (UTM) Ellipsoid: WGS 84 |
| DIRECT ACCESS | |
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| Available for access in-region with AWS Cloud | |
Region | |
| us-west-2 | |
| podaac-ops-cumulus-protected/SMODE_L2_DOPPLERSCATT_WINDS_CURRENT_V2/ | |
| podaac-ops-cumulus-public/SMODE_L2_DOPPLERSCATT_WINDS_CURRENT_V2/ | |
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| Name | Long Name | Unit |
|---|---|---|
| azimuth_diversity_flag_all_lines | flag for valid wind retrieval | 1 |
| azimuth_diversity_flag_line | flag for valid wind retrieval | 1 |
| cross_track_distance | Cross-track distance | m |
| current_cross_track_distance_all_lines_flag | Current cross-track distance flag | 1 |
| current_cross_track_distance_line_flag | Current cross-track distance flag | 1 |
| latitude | Measurement center latitude | degrees_north |
| line | flight lines used to make line estimates | 1 |
| longitude | Measurement center longitude | degrees_east |
| look_diff_all_lines | best azimuthal angle difference among observations | degrees |
| look_diff_line | best azimuthal angle difference among observations | degrees |
| mean_line_time | Line UTC time average. | days since 1950-01-01T00:00:00Z |
| mean_observation_time | Forward and backward measurement UTC time average. | days since 1950-01-01T00:00:00Z |
| mean_observation_time_all_lines | All lines UTC time average. | days since 1950-01-01T00:00:00Z |
| min_line_time | Maximum line UTC time. | days since 1950-01-01T00:00:00Z |
| min_observation_time_all_lines | Maximum UTC time for all lines. | days since 1950-01-01T00:00:00Z |
| nobs_all_lines | Total number of observations. | 1 |
| spatial_ref | spatial_ref | |
| u_current_all_lines | Surface current east component | m s-1 |
| u_current_error_all_lines | Surface current east component formal estimation error | m s-1 |
| u_current_error_line | Surface current north component formal estimation error | m s-1 |
| u_current_line | Surface current east component | m s-1 |
| v_current_all_lines | Surface current north component | m s-1 |
| v_current_error_all_lines | Surface current north component formal estimation error | m s-1 |
| v_current_line | Surface current north component | m s-1 |
| wind_dir_all_lines | Wind to direction clockwise relative to north. | degrees |
| wind_dir_error_all_lines | Wind to direction error clockwise relative to north. | degrees |
| wind_dir_error_line | Wind to direction error clockwise relative to north. | degrees |
| wind_dir_line | Wind to direction clockwise relative to north. | degrees |
| wind_dir_line_merged | Neutral wind speed at 10m | degrees |
| wind_speed_all_lines | Neutral wind speed at 10m | m s-1 |
| wind_speed_error_all_lines | Neutral wind speed error at 10m | m s-1 |
| wind_speed_error_line | Neutral wind speed error at 10m | m s-1 |
| wind_speed_line | Neutral wind speed at 10m | m s-1 |
| wind_speed_line_merged | Neutral wind speed at 10m | m s-1 |
| winds_likely_corrupted_line | wind estimation quality flag | 1 |
| x | UTM easting | m |
| xt_bias_u_line | cross-track bias in wind v-component | m s-1 |
| xt_bias_v_line | cross-track bias in wind v-component | m s-1 |
| y | UTM northing | m |
| DATA CITATION GUIDELINES | |
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| DATA RECIPE | |
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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 | E. Rodriguez, A. Wineteer, T. Gal, D. Perkovic-Martin, H. Torres, G. Gunther. 2023. S-MODE DopplerScatt Level 2 Ocean Winds Currents Version 2. Ver. 2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SMODE-DSCT2-V2
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Rodríguez, E., Wineteer, A., Perkovic-Martin, D., Gál, T., Stiles, B., Niamsuwan, N., & Monje, R.. 2018. Estimating Ocean Vector Winds and Currents Using a Ka-Band Pencil-Beam Doppler Scatterometer., Remote Sensing, 10, 4. https://doi.org//10.3390/rs10040576 |
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