NSCAT Level 1.7 SDR, Sigma-0 Cells

NSCAT Level 1.7 SDR, Sigma-0 Cells
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Short NameNSCAT_LEVEL_1.7_V2
DescriptionThe NASA Scatterometer (NSCAT) Level 1.7 ocean sigma-0 referenced to 50 km wind vector cells (WVC) contains daily backscatter (sigma-0) data from ascending and descending passes. Rain flagging information is not included. Data is flagged where measurements are either missing, ambiguous, or contaminated by land/sea ice. 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; re-processing had only minor impacts on the Level 1.7 data.
Dataset TypeOPEN
MeasurementSpectral/Engineering > Radar > Sigma Naught
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: 50 km (Along) x 50 km (Across)
ProjectionType: Swath
Detail: Along-track
Ellipsoid: WGS 84
Latency hours
Swath Width1 m
Sample Frequency-
Temporal Repeat (Nominal)12 Hour
Temporal Repeat (Min)1.7 Hour
Temporal Repeat (Max)41 Day
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
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: 1998-Jul-23
Resource: https://podaac-tools.jpl.nasa.gov/drive/files/allData/nscat/docs/nscat_manual.pdf
Keyword(s)sigma naught, sigma-0, backscatter, normalized radar cross-section, radar, nscat, adeos, scatterometer, 1.7
Persistent IDPODAAC-NSSDR-17X02
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Citation NASA/JPL/PO.DAAC. 1998. NSCAT Level 1.7 SDR, Sigma-0 Cells. Ver. 2. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/NSSDR-17X02.

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For more information see Data Citations and Acknowledgments.

Journal Reference NSCAT Science Data Product User Manual: Overview and Geophysical Data Products. April, 1997. JPL D-12985. Version 1.1.