OSARIS

Open Source SAR Investigation System

OSARIS provides a framework to process large stack of synthetic aperture radar (SAR) data in High Performance Computing (HPC) environments.

REQUIREMENTS:

1. A working installation of GMT5SAR, further info and installation instructions at http://gmt.soest.hawaii.edu/projects/gmt5sar/wiki
2. A working SLURM environment, further info and installation instructions at https://slurm.schedmd.com/

DOWNLOAD / INSTALLATION

Clone the OSARIS repository: git clone https://github.com/cryotools/osaris.git

PREPARATION

• Provide DEM data. You may use the DEM generator: http://topex.ucsd.edu/gmtsar/demgen/

• In the OSARIS folder, copy configuration templates to config folder

cp ./templates/config.template ./config/my_study.config cp ./templates/GMTSAR.template ./config/GMTSAR_my_study_.config

• Edit new config files to fit your needs and local configuration. See comments in template files for details.

• Make sure .sh files are executable (chmod +x )

LAUNCH

Go to the OSARIS folder. Launch your run with ./osaris.sh ./config/my_config.config

MODULES

Ping

Wake up sleeping nodes Status: beta

Prepare ArcticDEM

Prepare ArcticDEM tiles to be used as topo data in GMTSAR (merge, project). Status: alpha

Simple PSI

Identify persistent scatterers by finding data points of consitently high coherences. Status: alpha

Homogenize interferograms

Shift unwrapped interferograms and LOS relatively to 'stable ground points'. Status: alpha

Coherence diff

Calculate the difference between coherences. Status: conceptual

Unstable Coherence Metric

Identify regions where high coherence values drop substantially between two data takes. Status: beta

Timeseries xy

Extract values for particular coordinates throughout a series of grids (e.g. coherence, phase). Status: alpha

GETTING INVOLVED

Your participation in the development of OSARIS is strongly encouraged! In case you want to add a feature, module, etc., please fork your copy, code your additions, and open a merge request when finished. If you are interested in joining the development team please get in touch: https://hu.berlin/davidloibl .

CREDITING

As stated in the license file, you are free to use OSARIS in whatever way you like. If you publish OSARIS results, e.g. in scientific publications, please credit the website cryo-tools.org/tools/osaris .

Acknowledgements

Thanks to Ziyadin Cakir who supported the conception of OSARIS with thoughtful comments and by sharing scripts.