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Tool for integrating Sentinel-1 processing capabilities with GRASS GIS functionality

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GRASSINEL

University Project (FSU Jena) by Patrick Fischer, Marlin M. Mueller and Jonas Ziemer

This tool combines pyroSAR Sentinel-1 preprocessing capabilites with GRASS GIS (Version: 7.9dev) functionality for Sentinel satellite imagery.

It allows for automatic downloading of user-defined Sentinel-1 scenes, pre-processing, subsetting and multitemporal operations. Data is handled in GRASS internal formats and all available GRASS operations can be applied

Functionality Overview:

  • Automatic Setup of GRASS environment
  • Automatic download of Sentinel-1 data using the GRASS addon i.sentinel.download
  • Pre-processing of downloaded Sentinel-1 using pyroSAR functionality (ESA SNAP is required for the processing, see here)
  • Automatic subsetting of satellite data to specified region of interest
  • GRASS functionality:
    • Creation of space time raster datasets (STRDS) in GRASS
    • Different multitemporal operations in GRASS
  • Future functionality:
    • pyWPS implementation

Developed in Python 3.6, currently only supported on linux-based OS

Installation

In case you have git installed you can install the package as follows:

pip install git+https://github.com/marlinmm/GRASSINEL.git

Workflow of the GRASSINEL module:

GRASSINEL_workflow GRASSINEL workflow

Examples

Example of created timeseries processed using pyroSAR and created using GRASS GIS time series functionality S1_time_series_20m Sentinel-1 time series from 2020-06-06 to 2020-07-29 using only relative orbit number 168 in desending direction with 20m resolution with terrain flattening and thermal noise removal active (roughly 5 mins on 14 cores per scene)


S1_time_series_50m Sentinel-1 time series from 2020-06-01 to 2020-06-07 using all available datasets for the chosen time frame in ascending direction with 50m resolution without terrain flattening and thermal noise removal (roughly 2 mins on 8 cores per scene)


S1_time_series_date_plot Point plot of Sen-1 acquisition dates for VV and VH polariazation printed by the "visualize_stc" function


GRASSINEL GRASS GIS pyroSAR addon Screenshot of the GRASS addon for pyroSAR processing inside GRASS GISS

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