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.