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| DOI | 10.5067/NSBYU-SNEN0 |
| Short Name | NSCAT_BYU_L3_OW_SIGMA0_ENHANCED |
| Description | This 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 |
| Version | 1 |
| Dataset Type | OPEN |
| Measurement | SPECTRAL/ENGINEERING > RADAR > SIGMA NAUGHT > Normalized Radar Cross-Section CRYOSPHERE > SEA ICE > ICE EXTENT |
| Processing Level | 3 |
| Coverage | Region: 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 |
| Resolution | Spatial Resolution: 0.04 degrees (Latitude) x 0.04 degrees (Longitude) Temporal Resolution: 12 Hour |
| Projection | Type: Gridded Detail: Equal-Area and Polar-Stereographic Ellipsoid: WGS 84 |
| Latency | hours |
| 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: 1970-Jan-01 00:00:00 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 | Scatterometry Climate Record Pathfinder (SCP) |
| Data Provider | Creator: 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 |
| Persistent ID | PODAAC-NSBYU-SNEN0 |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
| PO.DAAC DRIVE | https://podaac-tools.jpl.nasa.gov/drive/files/allData/nscat/L3/byu_scp/sigma0enhanced |
| Format (Compression) | RAW (GZIP) |
| 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.
For more information see Data Citations and Acknowledgments.
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| 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. | |||||||
