NSCAT Gridded Level 3 Enhanced Resolution Sigma-0 from BYU
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DescriptionThis NASA Scatterometer (NSCAT) satellite Sigma-0 dataset is generated by the Scatterometer Climate Record Pathfinder (SCP) project at Brigham Young University (BYU) and is generated using a Scatterometer Image Reconstruction (SIR) technique developed by Dr. David Long. The SIR technique results in an enhanced resolution image reconstruction and gridded on an equal-area grid (for non-polar regions) at 4.45 km pixel resolution stored in SIR files; polar regions are gridded using a polar-stereographic technique. A non-enhanced version is provided at 22.25 km pixel resolution in a format known as GRD files. All files are produced in IEEE formatted binary. All data files are separated and organized by region, polarization, parameter, and sampling technique (i.e., SIR vs. GRD). The regions of China and Japan are combined into a single region. In additional to Sigma-0, various statistical parameters are provided for added guidance, including but not limited to: standard deviation, measurement counts, pixel time, Sigma-0 error, and average incidence angle. For more information, please visti: http://www.scp.byu.edu/docs/NSCAT_user_notes.html
Dataset TypeOPEN
MeasurementSPECTRAL/ENGINEERING > RADAR > SIGMA NAUGHT > Normalized Radar Cross-Section
Processing Level3
CoverageRegion: South America
Region: Arctic
Region: Siberia
Region: North America
Region: Central America
Region: Alaska
Region: Southern Asia
Region: North Africa
Region: Indonesia
Region: China
Region: Antarctica
Region: Japan
Region: Europe
Region: Bering Sea
Region: Australia
Region: Greenland
Region: South Africa
Northernmost Latitude: 89 degrees
Southernmost Latitude: -89 degrees
Westernmost Longitude: -180 degrees
Easternmost Longitude: 180 degrees
Time Span: 1996-Sep-15 to 1997-Jun-26
ResolutionSpatial Resolution: 0.04 degrees (Latitude) x 0.04 degrees (Longitude)
Temporal Resolution: 12 Hour
ProjectionType: Gridded
Detail: Equal-Area and Polar-Stereographic
Ellipsoid: WGS 84
Latency hours
Name: Advanced Earth Observing Satellite-I (ADEOS-I)
Orbit Period: 100.92 minutes
Inclination Angle: 98.59 degrees
Ascending Node: 1970-Jan-01 00:00:00
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.

ProjectScatterometry Climate Record Pathfinder (SCP)
Data ProviderCreator: BYU/SCP
Release Place: PO.DAAC
Release Date: 2011-Nov-28
Resource: https://podaac-tools.jpl.nasa.gov/drive/files/allData/L3/byu_scp/sigma0enhanced/docs/dLongNscat.html
Keyword(s)sigma naught, sigma-0, backscatter, normalized radar cross-section, radar, nscat, adeos, scatterometer, byu, david long, scp, sir
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
Citation BYU/SCP. 2011. NSCAT Gridded Level 3 Enhanced Resolution Sigma-0 from BYU. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/NSBYU-SNEN0.

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For more information see Data Citations and Acknowledgments.

Journal Reference Early, D. S. and D. G. Long, 2001: Image Reconstruction and Enhanced Resolution Imaging From Irregular Samples. IEEE Transactions on Geoscience and Remote Sensing, Vol. 39, No.2, pp. 291-302.