Composite (3A)

Sentinel-2 L2A (MAJA) and L3A (WASP) products, produced by DLR, available over Germany as WCS

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 […]

Composite (3A)

Persistent snow cover area in the Alps

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 […]

In English

20 m resolution snow maps, why bother?

« Snow varies. » (Snow scientist proverb) Sentinel-2 enables to generate snow maps at 20 m spatial resolution. But what’s the use of such high resolution snow maps? Because one picture is worth a thousand words, I resampled some Sentinel-2 images of snow-covered regions to coarser resolutions using the average reflectance of the contributing pixels. I did […]

snow-ice

Juste une meilleure image de couverture pour l’article de Simon ci-dessous

In English

How to find the closest snow to you?

If you live in Pamiers near Toulouse, France, where is the snow-covered place that is the fastest accessible by car or by bike? There is a beautiful snow map of the Pyrenees mountains near Pamiers from a Sentinel-2 image that was acquired yesterday (at the time of writing) [link to the data]. In QGIS with […]

En Français

Theia vous aide à trouver la neige la plus proche de chez vous

Si vous habitez à Pamiers, où se trouve la neige la plus rapidement accessible en voiture ? Theia nous fournit une belle carte de l’enneigement du 19 novembre 2019 dans les Pyrénées ariégeoises (lien vers les données). Dans QGIS avec l’API OpenRouteService on peut calculer les isochrones pour un trajet en voiture depuis Pamiers : […]

Composite (3A)

Theia starts producing Sentinel2 L3A products over Maghreb

=> 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 […]

Composite (3A)

Démarrage de production des N3A Sentinel2 de Theia au Maghreb

=> Depuis octobre 2019, Theia a commencé à produire les synthèses mensuelles Sentinel-2 sans nuages et quasiment sans coutures apparentes, sur la zone côtière du Maghreb, d’Agadir à Djerba en passant par Rabat, Alger et Tunis. Ces synthèses, dites de niveau 3A, seront désormais produites tous les mois, grâce à la chaîne WASP qui a […]

En Français

[Theia/MUSCATE] CNES cluster offline for two days

There will be no production within MUSCATE, or using the on-demand MAJA tool on PEPS, until wednesday 6th of November, as CNES HPC cluster is off for two days. An hardware and software upgrade is taking place. Il n’y aura pas de production dans MUSCATE, ou pour MAJA à la demande sur PEPS les 5 […]