Sentinel-2 a deux bandes dans le moyen infrarouge, la bande 11 dite SWIR1 (centrée à 1,6 µm) et la bande 12 dite SWIR2 (centrée à 2,2 µm). Mais pourquoi deux bandes SWIR ? Le « Mission Requirements Document » (MRD) est un document central dans la définition d’une mission spatiale car il décrit les besoins auxquels la […]
When I present the potential of Sentinel-2 for snow science, I often tell that the spatial resolution of Sentinel-2 is sufficient to detect snow at the scale of the ski runs. Because a picture is worth a thousand words, here is the Sentinel-2 view of the only two ski resorts in southern Africa on July […]
You might have noticed the apparition of the first Venµs L2A products on Theia web site within the real time production, since last Friday. A first global processing will start this summer, to provide you with the data acquired from November until now. There will be probably further reprocessings to benefit from the fine tuning […]
To celebrate the 10’000th snow product in Theia, here is the latest snow map over the Vicdessos area in the french Pyrenees near Andorra. The snow is in blue and the clouds are in white! Pan and explore the map below.. See full screen Big up to the Muscate team!
On March 9th, 2018, a tailings dam has failed at Cadia, a large open pit gold mine in Australia. Dave Petley for the AGU landslide blog collected aerial and satellite (Planet) images of the dam before and after the event. The Newcrest mining company also published a report on the failure. The embankment slump is […]
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 […]
Summary Until V0.9, only a small proportion of Venµs L1C data were available at L1C level on Theia’s website. Now, with the version V1.0, a greater proportion of products will be distributed to users, but we advise users to check their geometric quality in the metadata, as explained below. Distribution of V1.0 products should […]
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 […]