Subsetting Sentinel-3 products based on footprints given in the STAC metadata

[konstntokas]

• Added footprint-based subsetting for Sentinel-3 OLCI and SLSTR LST using STAC
  metadata, improving performance by avoiding full latitude/longitude grid downloads
  during subsetting.

Below, you can see example cutouts (and a notebook producing these plots). The light-blue polygon represents the full footprint, while the red points indicate the footprint samples derived from the STAC metadata. The solid green box shows the desired bounding box, and the dashed green box represents the bounding box of the dataset after clipping, which is then used for further processing. The orange outline corresponds to the SLSTR angle data used in the terrain correction step.

Note: The angles dataset has coarser sampling along the longitude axis and partially overlapping coverage, while the latitude dimension matches the resolution of the input dataset. Therefore, only the latitude dimension is subset to align the angles with the target region.

subset_sen3.ipynb

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Files with missing lines	Coverage Δ
xarray_eopf/amodes/sentinel3.py	100.00% <100.00%> (ø)
xarray_eopf/constants.py	100.00% <100.00%> (ø)
xarray_eopf/utils.py	100.00% <100.00%> (ø)
xarray_eopf/version.py	100.00% <100.00%> (ø)

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