=> Le centre de données Theia a produit en début de semaine la synthèse mensuelle des données Sentinel-2 pour le mois de juillet 2020 (avec nos chaines WASP et MAJA). Pour la troisième année consécutive, celle-ci est sans nuages et montre une forte sécheresse. Et celle-ci s’est probablement aggravée au cours du mois d’août. […]
We are thinking of a new « live » product which would allow anyone to display the most recent snow observations from Sentinel-2 in a web browser. This service would simply display a composite of the latest Theia Snow products over a given time window (e.g. the past 20 days). This can be easily coded thanks to […]
Voici un outil qui permet de trouver de la neige à moins de 100 km de chez vous ou dans votre département ! Cette app utilise les cartes de neige journalières produites par la Nasa à partir du capteur Modis sur le satellite Terra (MOD10A1.006). L’observation non-nuageuse la plus récente dans les dix dernières cartes […]
That’s unfair ! Sentinel-2 is a lucky satellite who still can visit Spain, Italy or Portugal every 5th day, while we are locked at home. Thanks to the hard work and good organisation at ESA (for the Level-1 products) and CNES (for the advanced L2A and L3A products), I have been able to generate mosaics […]
=> I take the advantage of this post to wish you all nice holidays, a merry christmas and a happy new year ! It will have taken us almost a year to process the 300 Sentinel-2 tiles in Theia’s area in Sahel, from the beginning of January 2017. This processing ends next week, and […]
=> Je profite de cet article pour vous souhaiter à tous de bonnes vacances, un joyeux Noel, et une excellente nouvelle année 2020 ! Il nous aura fallu près d’un an pour traiter les 300 tuiles de la zone Sahel de Theia, à partir de début Janvier 2017. Ce traitement s’achève ces jours-ci, il […]
In September 2019, the German Aerospace agency, DLR, started delivering Level-2A products (surface reflectances with a good cloud mask), using the MAJA L2A processor, to which DLR contributed with CNES and CESBIO. The system received a major upgrade recently: it now includes L3A data (seamless monthly syntheses generated with our WASP processor), and both L2A […]
These maps show the area that remained covered by snow from May 01 to Sep 01 over the past three years. It was computed from Theia Sentinel-2 snow products at 20 m resolution to capture the smallest snow patches. In average there are about 1300 km2 (Lake Geneva: 680 km2) which remain snow-covered until […]
=> Since October 2019, the Theia land data center started producing monthly cloud free and almost seamless syntheses, using Sentinel-2 data acquired on the Maghreb coastal regions, from Agadir to Djerba, passing through Rabah, Alger and Tunis. These syntheses, also called Level3A products, will be delivered every month, thans to the WASP processor, which was […]