NASA JPL Physical Oceanography Distributed Active Archive Center

nasa-podaac-qscat_byu_l3_ow_sigma0_arctic_polar-stereographic_browse_maps_ltod

SeaWinds on QuikSCAT Level 3 Sigma-0 Polar-Stereographic Local-Time-of-Day Browse Maps of Arctic Region

This dataset contains polar-stereographic-gridded Sigma-0 retrievals over the Arctic 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. 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/QSCAT_BYU_L3_OW_SIGMA0_ARCTIC_POLAR-STEREOGRAPHIC_BROWSE_IMAGES_LTOD. The QuikSCAT 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.

podaac.jpl.nasa.gov

http://podaac.jpl.nasa.gov/dataset/QSCAT_BYU_L3_OW_SIGMA0_ARCTIC_POLAR-STEREOGRAPHIC_BROWSE_MAPS_LTOD

Identified by : QSCAT_BYU_L3_OW_SIGMA0_ARCTIC_POLAR-STEREOGRAPHIC_BROWSE_MAPS_LTOD

This dataset was released on March 21, 2012.

The time range for this dataset is July 19, 1999 (18:39 PM) to November 21, 2009 (23:59 PM).

The spatial range for this dataset is 70° to 89.6° latitude, and 0° to 360° longitude. map (center)

This dataset uses data from an instance of the seawinds instrument on the quick-scatterometer platform.

Also known as :

• datasetId PODAAC-QSBYU-ARBLT (podaac lexicon)
• dataset QSCAT_BYU_L3_OW_SIGMA0_ARCTIC_POLAR-STEREOGRAPHIC_BROWSE_MAPS_LTOD (podaac lexicon)