Data access

theia.cnes.fr

Presentation

ESA’s Sentinel-2 mission, launched in the framework of the Copernicus program of the European Union, involves two satellites, Sentinel-2A and Sentinel-2B, launched respectively in June 2015 and March 2017.

These two satellites image all emerged lands every five days, at 10m resolution with 13 spectral bands from the visible through infra-red. ESA produces and distributes Level 1C ortho-rectified data expressed in reflectance at the top of the atmosphere. Level 1C data can also be downloaded from National Collaborative Ground Segments like PEPS.

Theia produces and distributes level 2A data, corrected for atmospheric effects thanks to the MAJA software developed in coordination between CNES/CESBIO and DLR. This processor uses multi-temporal information to detect clouds (and cloud shadows) and to estimate the optical properties of the atmosphere. For more information: www.cesbio.ups-tlse.fr/multitemp/?p=6050.

The CNES MUSCATE production center uses MAJA processor to produce in near-real time the Sentinel-2 data acquired on large areas shown here.), whereas the DLR will produce Germany area and distribute it through code-de.

The data are available at the following address: https://theia.cnes.fr

Contact

Olivier Hagolle
Cesbio
@O.Hagolle
Contributions

Satellite

Name : Sentinel-2A and Sentinel-2B

Imaging mode : optical

Spectral bands : 13 spectral multibands from blue to mid-infrared 

Resolutions : 10 m to 60 m according to spectral bands

Observation capability : 

  • Swath : 290 km
  • Revisit : 10 days (1 satellite) or 5 days (2 satellites)

Coverage : 

  • Area : France and other areas in the world
  • Period : from mid-2015, available starting 2016

For more information see sentinels.copernicus.eu

Level

Level 2A : data ortho-rectified surface reflectance after atmospheric correction, along with a mask of clouds and their shadows, as well as a mask of water and snow

Format

Technical note describing the format of SENTINEL-2 Level 2A products generated by MUSCATE.

MAJA Algorithm Theoretical Basis Document (ATBD)

License

The Sentinel-2 level 2A data distributed by THEIA are based on Copernicus Sentinel-2 level 1C data. These 1C data are released with the following license.

The level 2A products correct the data for atmospheric effects and detect the clouds and their shadows. This processing is carried out using MACCS processor (https://labo.obs-mip.fr/multitemp/?p=6203), through MUSCATE processing centre at CNES, in the framework of THEIA land data centre.

For any communication and/or any derivative product using this dataset, please cite : “Contains Copernicus Sentinel-2 data [year of reception] processed at level 2A by CNES for THEIA Land data centre”.