套件：python3-xsar（2024.02.1-1）
Python xarray reader to use Level-1 GRD Synthetic Aperture Radar products
XSAR is a distributed Level 1 Synthetic Aperture Radar (SAR) file reader designed to write efficient distributed processing algorithms with xarray and dask.
It currently handles Level-1 Sentinel-1 and Radarsat-2 data in SAFE format, as found on scihub or PEPS.
XSAR rely on `xarray.open_rasterio`, rasterio and GDAL to read digital_number from SAFE product to return an `xarray.Dataset` object with dask chunks. LUTs are decoded from XML files and applied to digital_number, following official ESA thermal de-noising document and ESA Sentinel-1 Product Specification.
End user can directly use for example sigma0 variable, or the de-noised sigma0 computed from digital_number and by applying relevant LUTs.
Since XSAR rely on dask, it have a small memory footprint: variables are read from file and computed only if needed.
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