SeaWinds on ADEOS-II Level 3 Sigma-0 Polar-Stereographic Local-Time-of-Day Browse Maps of Arctic Region
| DOI | 10.5067/SEABY-ARBLT |
| Short Name | SEAWINDS_BYU_L3_OW_SIGMA0_ARCTIC_POLAR-STEREOGRAPHIC_BROWSE_MAPS_LTOD |
| Description | This dataset contains polar-stereographic-gridded Sigma-0 retrievals over the Arctic Polar region from SeaWinds on ADEOS-II retrievals subsetted and averaged twice daily at the local time-of-day (LTOD); local times are approximately mid-day (08:00 to 16:00 local) and evening (16:00 to 24:00 local). The eight hour interval at each LTOD reference of mid-day vs. evening corresponds to the natural boundaries of time separation within the data at polar latitudes. Hence, mid-day and evening are used as approximations for the LTOD reference, where the actual LTOD may vary within the respective 8 hour interval. This dataset is generated using a Scatterometer Image Reconstruction (SIR) technique developed by Dr. David Long at Brigham Young University (BYU); the processed files are therefore known as SIR files. These SIR files were also used to generate a complimentary dataset of GIF images meant for browse purposes only and is available here: http://podaac.jpl.nasa.gov/dataset/SEAWINDS_BYU_L3_OW_SIGMA0_ARCTIC_POLAR-STEREOGRAPHIC_BROWSE_IMAGES_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. The SIR files are separated according to polarization. For example, one SIR file for a particular day and LTOD will contain the gridded average Sigma-0 values for 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 | SPECTRAL/ENGINEERING > RADAR > SIGMA NAUGHT CRYOSPHERE > SEA ICE > ICE EXTENT |
| 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: 2003-Apr-10 to 2003-Oct-24 Granule Time Span: 2003-Apr-10 to 2003-Oct-24 |
| 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 | ADEOS-II / Platform Name: Advanced Earth Observing Satellite-II (ADEOS-II) Orbit Period: 101.05 minutes Inclination Angle: 98.62 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/seawinds/L3/byu_scp/sigma0browse/lite/arctic_ltod PO.DAAC Drive |
| Format (Compression) | RAW |
| DATA CITATION POLICY | |
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| Citation | BYU/SCP. 2012. SeaWinds on ADEOS-II Level 3 Sigma-0 Polar-Stereographic Local-Time-of-Day Browse Maps of Arctic Region. Ver. 1. PO.DAAC, CA, USA. Dataset accessed [YYYY-MM-DD] at https://doi.org/10.5067/SEABY-ARBLT
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. | |||||||