The Theia workshop for Sentinel-2 L2A MAJA products was held in Toulouse on the 13th and 14th of June 2018. About 80 people participated either on the 13th or 14th, and nearly 70 participants attended each day of this workshop, whose object was to collect feedback and share experiences on the quality, use and applications […]
The figure below shows the evolution of the Normalized Difference Vegetation Index (NDVI) in the pitches of all the 2018 World Cup stadiums. I retrieved these data from Sentinel-2 observations using the new time series plotter in the EO Browser. I just drew a polygon in each of the 12 stadiums to get the average […]
Last year, in this post, I showed the comparison of two Sentinel-2 images of Saint Barthélemy in the Caribbean before and after the powerful Hurricane Irma. A new feature in the EO Browser enables to plot the evolution of the mean NDVI within a polygon. I drew a rough polygon of Saint Barthélemy to check […]
On June 23 we will celebrate the third anniversary of Sentinel-2A in orbit. With three years of data we can start looking at the inter-annual variability of biophysical variables, like.. (random example), the snow cover. This is what I attempted to do for the Theia workshop. I downloaded all available snow cover products from Theia over […]
=> Sentinel-2B has two channels centered on water vapour absorption bands: channel 9 (940 nm) and channel 10 (1380 nm). Band 10 corresponds to a very strong absorption, strong enough to prevent any photon to reach ground from the Sun without being absorbed in the atmosphere. This band is intensively used to detect and correct […]
=> Sentinel-2B dispose de deux canaux centrés sur des bandes d’absorption de la vapeur d’eau: la bande 9 (940nm) et la bande 10 (1380 nm). La bande 10 correspond à une très forte absorption, telle qu’en général, dans cette bande, les photons n’ont aucune chance d’atteindre le sol, et encore moins le satellite après réflexion […]
We will start distributing MAJA V3.1 this May to replace MAJA V1 on CNES free software platform. It is also in the pipeline of enhancements of Theia processing platform (MUSCATE), but this pipeline is quite full, so we will need to be patient (which requires a big effort for me, patience not being my best quality…) MAJA […]
Si vous avez vu le JT du 26 mars dernier, vous savez que le lac de Serre-Ponçon est à un niveau exceptionnellement bas en ce moment [1].
A good piece of news, directly from ESA’s S2 project manager: ESA is now making plans for a global reprocessing of Sentinel-2 archive in 2019. As explained here, Sentinel-2 data multi-temporal registration isn’t perfect yet. It should be improved in the first quarter of 2019, thanks to the use of ground control points obtained via […]