SeaWinds on QuikSCAT Level 3 Sigma-0 Polar-Stereographic Local-Time-of-Day Browse Images of Arctic Region
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| DOI | 10.5067/QSBYU-ARILT |
| Short Name | QSCAT_BYU_L3_OW_SIGMA0_ARCTIC_POLAR-STEREOGRAPHIC_BROWSE_IMAGES_LTOD |
| Description | This dataset contains GIF images of polar-stereographic-gridded Sigma-0 retrievals over the Antarctic Polar region from SeaWinds on QuikSCAT retrievals subsetted and averaged twice daily at the local time-of-day (LTOD); local times are approximately morning (00:00 to 08:00 local) and evening (16:00 to 24:00 local). The eight hour interval at each LTOD reference of morning vs. evening corresponds to the natural boundaries of time separation within the data at polar latitudes. Hence, morning and evening are used as approximations for the LTOD reference, where the actual LTOD may vary within the respective 8 hour interval. It should be noted that these GIF images are meant for browse purposes only and should not be considered science quality. The GIF images are generated from a scientific dataset employing a Scatterometer Image Reconstruction (SIR) technique developed by Dr. David Long at Brigham Young University (BYU); the science quality source dataset containing the SIR files used to generate the GIF images is accessible here: http://podaac.jpl.nasa.gov/dataset/QSCAT_BYU_L3_OW_SIGMA0_ARCTIC_POLAR-STEREOGRAPHIC_BROWSE_MAPS_LTOD. The SeaWinds scatterometer scans at two nominal incidence angles, 46 degrees and 54.1 degrees, corresponding to the inner and outer beams respectively. The inner beam is horizontally polarized while the outer beam is vertically polarized. As with the SIR files, the GIF images are separated according to polarization. For example, one SIR file for a particular day and LTOD will contain the gridded average Sigma-0 values derived from the horizontally polarized L1B retrievals, while the other will contain those from the vertically polarized L1B retrievals. This dataset is generated by the Scatterometer Climate Record Pathfinder (SCP) project at BYU. |
| Version | 1 |
| Dataset Type | COMPLETE |
| Measurement | CRYOSPHERE > SEA ICE > ICE EXTENT SPECTRAL/ENGINEERING > RADAR > SIGMA NAUGHT |
| Processing Level | 3 |
| Coverage | Region: ARCTIC Region: POLAR Region: ARCTIC Region: ARCTIC North Bounding Coordinate: 89.6 degrees South Bounding Coordinate: 70 degrees West Bounding Coordinate: -180 degrees East Bounding Coordinate: 180 degrees Time Span: 1999-Jul-19 to 2009-Nov-21 Granule Time Span: 1999-Jul-19 to 2009-Nov-21 |
| Resolution | Spatial Resolution: 0.201 degrees (Latitude) x 0.201 degrees (Longitude) Temporal Resolution: 12 Hour |
| Projection | Projection Type: Gridded Projection Detail: Polar-Stereographic Ellipsoid: WGS 84 |
| Platform/Sensor | QUIKSCAT / Platform Name: QUIKSCAT (QUIKSCAT) Orbit Period: 100.93 minutes Inclination Angle: 98.6 degrees SEAWINDS SENSOR Name: SeaWinds Scatterometer (SEAWINDS) Swath Width: 1800.0 kilometers Description: Spacecraft angular distance from orbital plane relative to the Equator. |
| Project | Scatterometry Climate Record Pathfinder (SCP) |
| Data Provider | Publisher: PO.DAAC Creator: BYU/SCP Release Place: PO.DAAC Release Date: 2012-Mar-21 Resource: https://podaac-tools.jpl.nasa.gov/drive/files/allData/quikscat/L3/byu_scp/sigma0browse/docs/dLongSigBrw.pdf |
| Keyword(s) | sigma-0, sigma0 browse, sigma0, browse, backscatter, sir, byu, ltod, local-time-of-day, local time of day, scp, david long |
Questions related to this dataset? Contact podaac@podaac.jpl.nasa.gov
| Direct Access | |
| PO.DAAC DRIVE | https://podaac-tools.jpl.nasa.gov/drive/files/allData/quikscat/L3/byu_scp/sigma0browse/images/arctic_ltod PO.DAAC Drive |
| Format (Compression) | GIF |
| DATA CITATION POLICY | |
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| Citation | BYU/SCP. 2012. SeaWinds on QuikSCAT Level 3 Sigma-0 Polar-Stereographic Local-Time-of-Day Browse Images of Arctic Region. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/QSBYU-ARILT
For more information see Data Citations and Acknowledgments.
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| Journal Reference | Hicks, B. R. and D. Long. March, 2005. Improving temporal resolution of SIR images for QuikSCAT in the polar regions. Technical Report MERS 05-02. Microwave Earth Remote Sensing Laboratory, Brigham Young University, Provo, UT. . |
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