S-MODE DopplerScatt Level 2 Ocean Winds and Currents Version 1
(SMODE_L2_DOPPLERSCATT_WINDS_CURRENT_V1)| Version | 1 |
| Processing Level | 2 |
| Start/Stop Date | 2021-Oct-20 to 2021-Nov-05 |
| Short Name | SMODE_L2_DOPPLERSCATT_WINDS_CURRENT_V1 |
| 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) during a pilot campaign conducted approximately 300 km offshore of San Francisco over two weeks in October 2021. 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. 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 V1 data have been cross-calibrated against SIO-DopVis leading to the 'dopvis_2021' current geophysical model function. It is expected that additional DopVis data will lead to a reprocessing of this data set and it should be regarded as provisional, to be refined after future S-MODE deployments. Data are available in netCDF format. |
| DOI | 10.5067/SMODE-DSCT2 |
| 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, Fred Bingham Creator: E. Rodriguez, A. Wineteer, T. Gal, D. Perkovic-Martin, H. Torres, G. Gunther Release Date: 2022-Nov-21 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 North Bounding Coordinate: 38.2 degrees South Bounding Coordinate: 36.3 degrees West Bounding Coordinate: -126.2 degrees East Bounding Coordinate: -122.1 degrees Time Span: 2021-Oct-20 to 2021-Nov-05 Projection Projection Type: Universal Transverse Mercator (UTM) Ellipsoid: WGS 84 |
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Region | |
| us-west-2 | |
| podaac-ops-cumulus-protected/SMODE_L2_DOPPLERSCATT_WINDS_CURRENT_V1/ | |
| podaac-ops-cumulus-public/SMODE_L2_DOPPLERSCATT_WINDS_CURRENT_V1/ | |
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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 |
| azimuth_diversity_flag_triplet | flag for valid wind retrieval | 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 |
| look_diff_triplet | best azimuthal angle difference among observations | degrees |
| max_triplet_observation_time | Triplet forward and backward measurement UTC time maximum. | 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_triplet_observation_time | Triplet forward and backward measurement UTC time average. | days since 1950-01-01T00:00:00Z |
| min_triplet_observation_time | Triplet forward and backward measurement UTC time minimum. | days since 1950-01-01T00:00:00Z |
| nobs_all_lines | Total number of observations. | 1 |
| spatial_ref | spatial_ref | |
| triplet | flight line triplets used to make triplet estimates | 1 |
| u_current_all_lines | Surface current east component | m s-1 |
| u_current_error_all_lines | Surface current east component standard deviation | m s-1 |
| u_current_error_line | Surface current north component standard deviation | m s-1 |
| u_current_error_triplet | Surface current east component standard deviation | m s-1 |
| u_current_line | Surface current east component | m s-1 |
| u_current_triplet | 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 standard deviation | m s-1 |
| v_current_error_triplet | Surface current north component standard deviation | m s-1 |
| v_current_line | Surface current north component | m s-1 |
| v_current_triplet | 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_error_triplet | 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 | m s-1 |
| wind_dir_triplet | Wind to direction clockwise relative to north. | 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_error_triplet | 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 |
| wind_speed_triplet | Neutral wind speed at 10m | m s-1 |
| winds_likely_corrupted_line | wind estimation quality flag | 1 |
| winds_likely_corrupted_triplet | 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. 2022. S-MODE DopplerScatt Level 2 ocean winds currents Version 1. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SMODE-DSCT2
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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