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 * [6S](http://6s.ltdri.org/) - Second Simulation of the Satellite Signal in the Solar Spectrum (6S) open source algorithm.
 * [Py6S](https://py6s.readthedocs.io/en/latest/) - Py6S is a interface to the Second Simulation of the Satellite Signal in the Solar Spectrum (6S) atmospheric Radiative Transfer Model through the Python programming language.
 * [i.atcorr](https://grass.osgeo.org/grass70/manuals/i.atcorr.html) - GRASS GIS module that performs atmospheric correction using the 6S algorithm.
+* [sen2cor](http://step.esa.int/main/third-party-plugins-2/sen2cor/) - is a processor for Sentinel-2 Level 2A product generation and formatting; it performs the atmospheric-, terrain and cirrus correction of Top-Of- Atmosphere Level 1C input data.
 
 ## Agent-based Modeling
 * [Mesa](https://github.com/projectmesa/mesa) - Mesa is an Apache2 licensed agent-based modeling (or ABM) framework in Python.