NSCAT High-Resolution MGDR, Sigma-0 and Ocean Wind Vectors (Dunbar)

NSCAT High-Resolution MGDR, Sigma-0 and Ocean Wind Vectors (Dunbar)
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DOI10.5067/NSMGD-SIGW2
Short NameNSCAT_25KM_MGDR_V2
DescriptionThe 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.
Version2
Dataset TypeOPEN
MeasurementSpectral/Engineering > Radar > Sigma Naught
Oceans > Ocean Winds > Surface Winds > Ocean Surface Wind Vectors
Cryosphere > Sea Ice > Ice Extent
Processing Level2
CoverageRegion: 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
ResolutionSpatial Resolution: 25 km (Along) x 25 km (Across)
ProjectionType: Swath
Detail:
Ellipsoid: WGS 84
Latency-999 hours
Swath Width1 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.

ProjectNASA Scatterometer (NSCAT)
Data ProviderCreator: 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 IDPODAAC-NSMGD-SIGW2
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
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.

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