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ESA  is developing  free open source toolboxes for the scientific exploitation of Earth Observation missions under the the Scientific Exploitation of Operational Missions (SEOM)  programme element.  STEP is the ESA community platform for accessing the software and its documentation, communicating with the developers, dialoguing within the science community, promoting results and achievements as well as providing tutorials and material for training scientists using the Toolboxes.

The ESA toolboxes support the scientific exploitation for the ERS-ENVISAT missions, the Sentinels 1/2/3 missions and a range of National and Third Party missions. The three toolboxes are called respectively Sentinel 1, 2 and 3 Toolboxes and  share a common architecture called  SNAP. They  contain some functionalities of historical toolboxes such as BEAM, NEST and Orfeo Toolbox that were developed over the last years.


features start_using documentation features
SNAP Features Download Tutorials Community
documentation developers external_projects blog
Documentation Developers Gallery Blog


The following results have been obtained thanks to the Sentinel Toolboxes :

Latest News

ESA SNAP Toolbox surpasses 300000 downloads

The ESA SNAP Toolbox surpassed 300000 downloads on December 19th 2018. SNAP stands for “SeNtinels Application Platform” and it is the fully free and open-source toolbox platform that supports processing of raster imagery from ESA, Copernicus Sentinel 1/2/3, and many 3rd party satellite missions. SNAP is available at: and the SNAP discussion forums can […]

STEP Forum live again, but some DNS changes may take awhile

Dear STEP Users, The Forum is live again. It can be accessed at the following address: Please note that some DNS changes operated today may take awhile to be applied for everyone. The read-only copy of the forum will be accessible in the following days, until the changes are applied. If the forum is […]

STEP Forum read-only on 22nd of May, 2017, between 5 AM UTC and 15 PM UTC

Dear STEP Users, Please be informed that the STEP forum will be read-only tomorrow, 22nd of May, 2017, between 5 AM UTC and 15 PM UTC. This means the forum will be able to display posts, but not to save new posts or other actions. This operation is part of periodic administration operations, and has […]

New release of Sen2Cor 2.5.5 is available

Dear Users, we are pleased to provide Sen2Cor Release 2.5.5 under: Stand-alone installers for the three operating systems Linux, Windows and macOS are now available. All three versions require a 64-bit platform. Note, that a product format change has been applied to the data products: The naming logic of the files embedded in the […]

OGC Announces Earth Observation Exploitation Platform Hackathon 2018

Dear users, The Open Geospatial Consortium (OGC®), together with the European Space Agency (ESA), and Natural Resources Canada (NRCan) is organizing the Earth Observation (EO) Cloud Processing Hackathon. This Hackathon provides a business opportunity for stakeholders to experiment with the latest results from Testbed-13 in the context of ESA’s Earth Observation (EO) Exploitation Platforms. The […]