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On demand Ortho-rectification of Sentinel-1 data on Sentinel-2 grid.

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On demand Ortho-rectification of Sentinel-1 data on Sentinel-2 grid.

Sentinel-1 is currently the only system to provide SAR images regularly on all lands on the planet. Access to these time series of images opens an extraordinary range of applications. In order to meet the needs of a large number of users, including our needs, we have created an automatic processing chain to generate "Analysis Ready" time series for a very large number of applications.

Sentinel-1 data is ortho-rectified on the Sentinel-2 grid to promote joint use of both missions.

S1Tiling was developed within the CNES radar service, in collaboration with CESBIO, to generate time series of calibrated, ortho-rectified and filtered Sentinel-1 images on any terrestrial region of the Earth. The tool benefits for the SAR ortho-rectification application from the Orfeo Tool Box.

The resulting images are registered to Sentinel-2 optical images, using the same MGRS geographic reference. You will be able to access Sentinel-1 data acquired on Sentinel-2 31TCJ or 11SPC tiles.This Python software, is based on the Orfeo Tool Box (OTB) image processing library, developed by CNES, as well as on the PEPS platform to access the Sentinel-1 data. It can be used on any type of platform, from a large computing cluster to a laptop (the fan will make some noise during processing). It is considerably faster than the ortho-rectification tool in SNAP, and can be easily used in script form.

S1Tiling is currently used for many applications, such deforestation detection in the Amazon, monitoring of rice crops in Southeast Asia or monitoring of water stocks in India.In addition, this software is accessible as an on-demand processing service on the French PEPS collaborative ground segment, in order to make it easier for users to use.


S1Tiling installation has a few traps. Please read the relevant documentation regarding OTB and GDAL installation.


  • OTB 7.2
  • GDAL with python bindings as well
  • Python 3
    • click
    • eodag
    • numpy
    • gdal
    • yaml
    • Dask"distributed"
    • bokeh (to display Dask dashboard)
    • graphviz (to generate task graphs)


Dask does not require any setup if you only want to use it on a single computer. --


S1Tiling Discourse (status)


Copyright (c) CESBIO. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


(according to master branch on

  • Thierry KOLECK (CNES)
  • Julien MICHEL (CNES)

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