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Work-in-process preprocessor for Sentinel-1 data
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SDFIdk/Sentinel_1_SNAP_preprocessor
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DOCUMENTATION FOR SENTINEL 1 PREPROCESSOR 04-03-2024 This script acquires converts, crops and denoises Sentinel-1 and -2 USER INPUTS While the script is designied to be run with a data range, shape file, directory SNAP xml and crs, several other parameters can be adjusted in the userscript for which the script has default valus otherwise. REQUIRED INPUTS Working and output folders As this script will acquire data from CDSE, only a directory path for the files is needed, not the files themselves. This dir will then contain the SAFE files and the geotiffs being worked on. The output dir will then serve as a destination for the finished 7z file. Shape Shape must be a path to the .shp file of an unzipped shapedir or a zipped shapefile. Used for determining extent for product acquisition and clipping images down. CRS Must be a string in EPSG:XXXXX format. Reverts to EPSG:4326 if invalid or 'None' Used to warp both shape and images. Date range A start and end date must be specified for the acquisition script. Any data availabe in that range over the shape file will be downloaded to the working dir Pre process g gpt_exe Defaults to 'C:/Users/b025527/AppData/Local/snap/bin/gpt.exe' Path to SNAPs gpt tool. Required for processing of SAFE files. OPTIONAL INPUTS Concurrency Defaults to 4 Number of download threads from CDSE. Maximum is 4. Land sea mask Defaults to "shapes/landpolygon_1000.zip" Land sea mask shape file either zipped or unzipped. Currently set to Denmark but can be any shape Max cloud pct Defaults to 40 Defines maximum allowed cloud percent within shape value for Sentinel-2 images Polarization Defaults to [VV, VH] Polarizations for Sentinel-1. Either or both modes can be selected and a file will be made for either. Denoise mode Defaults to mean Selects which mode to densoise files. Mean will use a mean filter on a 3x3 window. SAR2SAR will use an ML based denoising method. Incompatible with sigma0.
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