Enables cloud-native SAR processing via Xarray and Dask.

Sarsen is a Python library and command line tool with the following functionalities:

* provides algorithms to terrain-correct satellite SAR data - geometric terrain correction (geocoding) * fast mode: to terrain-correct images * accurate mode: for interferometric processing - radiometric terrain correction (gamma flattening) * accesses SAR data via xarray-sentinel: - supports most Sentinel-1 data products as distributed by ESA: * Sentinel-1 Single Look Complex (SLC) SM/IW/EW * Sentinel-1 Ground Range Detected (GRD) SM/IW/EW - reads uncompressed and compressed SAFE data products on the local computer or on a network via fsspec * accesses DEM data via rioxarray: - reads local and remote data in virtually any raster format via rasterio / GDAL * supports larger-than-memory and distributed data access and processing via Dask - efficient geometric terrain-correction for a full GRD - efficient radiometric terrain-correction for a full GRD.