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SWOT KaRIn Low Rate Ocean products

Type of dataset: SWOT KaRIn Low Rate Sea Surface Height products (L2_LR_SSH)

DOI:
- SWOT_L2_KaRIn_SSH_Basic: 10.24400/527896/a01-2023.013  -  more metadata
- SWOT_L2_KaRIn_SSH_WindWave: 10.24400/527896/a01-2023.014  -  more metadata
- SWOT_L2_KaRIn_SSH_Expert: 10.24400/527896/a01-2023.015  -  more metadata
- SWOT_L2_KaRIn_SSH_Unsmoothed: 10.24400/527896/a01-2023.016  -  more metadata

Contents: The L2_LR_SSH product provides measurements over ocean surfaces from the low rate (LR) data stream of the SWOT KaRIn instrument. The L2_LR_SSH product is available continuously and globally, with a latency of less than 45 days, although different versions of the product may be generated at different latencies and/or through reprocessing with refined input data. Note that the L2_LR_SSH product does not include SSH data from the SWOT nadir altimeter. Nadir altimeter data are available from separate data products. 

Use: high resolution global ocean altimetry, coastal currents and processes, oceanic mesoscale and sub-mesoscale processes, ocean bathymetry.

Condition of access: L2_LR_SSH product's processing and distribution are conducted by the joint NASA/CNES project in collaboration with the SWOT Science Team (ST). To date, KaRIn beta pre-validated products are only made available to support SWOT mission validation.

Description: the L2_LR_SSH product is organized into four files per product granule, as some users may be interested in only a small fraction of the full data product.
Three of the files in the L2_LR_SSH product are sampled on a geographically fixed, swath-aligned 2 km grid. These files are referred to as:

  1. Basic SSH [‘Basic’],
  2. Wind and Wave [‘WindWave’], and
  3. Expert SSH with Wind and Wave [‘Expert’].

The fourth file in the L2_LR_SSH product, referred to as Unsmoothed SSH [‘Unsmoothed’] file, is sampled on a finer spatial grid of approximately 250 m, and has a significantly larger data volume than the three other files. Note that the measurements in this file have a resolution of approximately 500 m (the data are oversampled by about a factor of 2 in each direction).

Further information about the L2_LR_SSH product can be found here.

Citation: "The SWOT L2_LR_SSH data product is made freely available by the SWOT project and the national programs that contribute to it. L2_LR_SSH product quality is not final and will be affected by some evolutions as the SWOT project team makes progress on science data processing algorithms and instrument calibrations." SWOT Project. (2023). SWOT Level-2 KaRIn Low Rate SSH + FileType (Version x.x) [Data set]. CNES. + DOI

Geographic coverage: global

 

Level 2 KaRIn Low Rate Sea Surface Height Data Product (Beta Pre-validated only)

Product files AVISO Distribution services Delivery delay Grid File size Handbook
/day /year
L2_LR_SSH [‘Basic’] Available via your personal space: MY AVISO+
and the new AVISO+ Cnes Data Center archive (new users can fill the following registration form for data access, with identical credentials for both services)
- 2 km ​geographically fixed ​swath-aligned grid​ 1 GB 365 GB User Guide L2 KaRIn LR SSH product
​L2_LR_SSH [‘WindWave’]​ - 1 GB 365 GB
L2_LR_SSH [‘Expert’]​ - 3 GB 1 TB
L2_LR_SSH [‘Unsmoothed’]​ - ~250 m ​center-beam (native) ​sampling grid​ 40 GB 15 TB
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