SAR data preprocessing

An automated way of pre processing Sentinel-1 SAR data. The script uses the Graph Processing Tool (gpt) in SNAP (S1TBX - ESA Sentinel-1 Toolbox, http://step.esa.int) and performs all the necessary pre processing steps for the Sentinel-1 data

The script performs teh following pre processing steps

• SAR scene subset
• Thermal noise removal
• Speckle noise supression
• Calibration (sigman nought)
• Terrain flattening
• Terain correction and georeference to WGS84 coordinate system

Run the script

prerequisites

• The bash scipt is looking for location of the gpt installation at ~/snap/bin/gpt. If the gpt is not installed at this directory, then the location of the gpt should be changed to /opt/snap/bin/gpt at the top of the bash sscript

• Define an area of interest (AOI). The script is looking for an AOI in teh form of WKT. It subsets the Seninel-1 data around the AOI. Visit the wicket website, draw a polygon over the AOI, copy the coordinates generated and paste them in the folder aoi

Execute the script

bash s1_preprocessing.sh graph/s1_preprocessing.xml input aoi/aoi.txt output/