SWOT Raster 250m

The SWOT Level-2 HR Raster - 250m dataset provides rasterized water surface elevation and inundation extent data from the High Resolution data stream of the SWOT KaRIn instrument, along with appropriate uncertainties and flags. It has been resampled onto a uniform grid at 250 meter resolution.

This dataset is also available at 100m resolution in the SWOT Level-2 HR Raster - 100m dataset.

The dataset was generated by the SWOT Mission Center but may be simulated using the SWOT Raster Processor Open Source tools.

The SWOT Level-2 HR Raster - 250m dataset is organized into swath-aligned tiles. Each of these tiles nominally contains data over 128 km x 128 km.

Major SWOT product versions are called “baseline”. Currently, on our platform, you can download and manipulate products from both baseline C and D. Baseline C covers the period from March 28, 2023 to May 05, 2025. After this date, only baseline D products are available. A global reprocessing is on-going to produce baseline D products for the full SWOT activity period. Baseline D products are progressively made available so you might find some gap in baseline D until the end of the reprocessing.

General, global and up-to-date information on SWOT products can be find in the SWOT User Handbook. For a focus on how to distinguish between Baseline C and D products along with most significant changes in products, please refer to the Version D Release Note and the Major Changes from Version C to D slides.

Finally, you will find below links to the Product Description Document (PDD) and Algorithm Theoretical Basis Document (ATBD) for a thorough look at the product: