NSCAT High-Resolution MGDR, Sigma-0 and Ocean Wind Vectors (Dunbar)
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| DOI | 10.5067/NSMGD-SIGW2 |
| Short Name | NSCAT_25KM_MGDR_V2 |
| Description | The NASA Scatterometer (NSCAT) Level 2.5 high-resolution merged ocean wind vectors and sigma-0 in 25 km wind vector cell (WVC) swaths contain daily data from ascending and descending passes. Wind vectors are accurate to within 2 m/s (vector speed) and 20 degrees (vector direction). Wind vectors are not considered valid in rain contaminated regions; rain flags and precipitation information are not provided. Data is flagged where measurements are either missing or ambiguous. In the presence of land or sea ice winds values are set to 0, and sigma-0 values are preserved where measurements are available. This is the most up-to-date version, which designates the final phase of calibration, validation and science data processing, which was completed in November of 1998, on behalf of the JPL NSCAT Project; wind vectors are processed using the NSCAT-2 geophysical model function. |
| Version | 2 |
| Dataset Type | OPEN |
| Measurement | Spectral/Engineering > Radar > Sigma Naught Oceans > Ocean Winds > Surface Winds > Ocean Surface Wind Vectors Cryosphere > Sea Ice > Ice Extent |
| Processing Level | 2 |
| Coverage | Region: Global Northernmost Latitude: 90 degrees Southernmost Latitude: -90 degrees Westernmost Longitude: 0 degrees Easternmost Longitude: 360 degrees Time Span: 1996-Sep-15 to 1997-Jun-29 |
| Resolution | Spatial Resolution: 25 km (Along) x 25 km (Across) |
| Projection | Type: Swath Detail: Ellipsoid: WGS 84 |
| Latency | -999 hours |
| Swath Width | 1 m |
| Sample Frequency | - |
| Temporal Repeat (Nominal) | 12 Hour |
| Temporal Repeat (Min) | 1.7 Hour |
| Temporal Repeat (Max) | 41 Day |
| Platform/Sensor | ADEOS-I / Platform Name: Advanced Earth Observing Satellite-I (ADEOS-I) Orbit Period: 100.92 minutes Inclination Angle: 98.59 degrees Ascending Node: 1996-Sep-14 22:20:33 NSCAT SENSOR Name: NASA Scatterometer (NSCAT) Swath Width: 1600 km Description: Every two days, under all weather and cloud conditions, NSCAT measured wind speeds and directions over at least 90% of the Earth's ice-free oceans. NSCAT used six antenna beams to scan two wide bands of ocean, one on each side of the instrument's orbital path. NSCAT transmited short pulses of microwave energy to probe ocean surfaces and then measured the reflected or backscattered power. Variations in the magnitude of this backscattered power are caused by changes in small (centimeter-sized), wind-driven waves. Using a method called Doppler processing, the measured backscattered power was separated into cells at specific locations on Earth's surface. |
| Project | NASA Scatterometer (NSCAT) |
| Data Provider | Creator: NASA/JPL/PO.DAAC Release Place: PO.DAAC Release Date: 2006-Feb-20 Resource: https://podaac-tools.jpl.nasa.gov/drive/files/pub/ocean_wind/nscat/doc/l25_usersguide.pdf |
| Keyword(s) | wind data, wind, ocean wind, wind speed, vector, vectors, ocean wind vector, ocean wind vectors, nscat, adeos, scatterometer, mgdr |
| Persistent ID | PODAAC-NSMGD-SIGW2 |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
| PO.DAAC DRIVE | https://podaac-tools.jpl.nasa.gov/drive/files/allData/nscat/L25/v2 |
| Format (Compression) | RAW (ZIP) |
| Web Service | https://podaac.jpl.nasa.gov/ws/search/granule/?datasetId=PODAAC-NSMGD-SIGW2&apidoc (Search Granule) |
| Citation | NASA/JPL/PO.DAAC. 2006. NSCAT High-Resolution MGDR, Sigma-0 and Ocean Wind Vectors (Dunbar). Ver. 2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/NSMGD-SIGW2.
For more information see Data Citations and Acknowledgments.
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