In English
The Nature News website reported yesterday on a massive ice avalanche that happened in Rutog, Tibet, on 17 July 2016. This ice avalanche killed 9 people and may be one the largest ever observed. The ice and rock mixture spread over 6 km from the collapse point up to the Aru Co lake shoreline.
En Français
=> Dans un précédent billet, j’ai montré un exemple de série temporelle obtenu sur un pixel de forêt de pins, qui met en valeur la bonne qualité des séries temporelles que l’on obtient avec les données Sentinel-2, traitées au niveau 2A par THEIA en utilisant la chaîne MACCS. (les données de niveau 2A sont corrigées […]
In English
Since October 2015, the TOMCAR-Sat project aims to use high resolution satellite products to monitor Dissolved Organic Carbon (DOC) fluxes on the Arctic river Yenisei. Specifically, its objectives consist to calibrate a DOC retrieval model from time-series of satellite images and to characterize dynamics of the factors that may affect DOC concentrations, i.e. the snow […]
In English
=> In a previous post, I showed a time series of pixels showing the good data quality of time series we get with Sentinel-2, processed to Level 2A by THEIA using MACCS processor. However, I concluded that the plot I showed still had some low noise, and that a part of it was due to […]
Applications
NASA’s blog « Image of the Day » recently featured two beautiful MODIS images of the snow cover in Lesotho. In late July Lesotho experienced its heaviest snowfall in two decades. The snow is not uncommon in Lesotho given that over 80% of the country lies above 1800 m. However the frequency of such snow events has […]
Composite (3A)
As MACCS was used to produce a large amount of images (all the images acquired over France), we were able to make some more validation tests, such as checking the surface reflectance stability. To do that, the region of Arles in Provence (France), tile 31TFJ, is a good site, with a lot of clear skies, […]
In English
=> Theia – MUSCATE I had a week of work in the middle of my holidays, which enabled be to see how the work on Sentinel-2 L2A data distribution is progressing. My colleagues who worked all July (Dominique, Joelle, Céline…) did a great job : they were able to process a large data set of […]
En Français
=> Theia – MUSCATE J’ai pris une petite semaine de travail au milieu de mes vacances, ce qui m’a permis de suivre un peu l’avancement des travaux sur Sentinel-2. Mes collègues aoûtiens (Dominique, Joelle, Céline…) ont bien travaillé en juillet : ils ont pu lancer une production de masse avec MUSCATE. Ils ont traité toutes […]
Applications
=> You already heard about iota2 processor, and you must know that it can process LANDSAT 8 time series et deliver land cover maps for whole countries. These las days, Arthur Vincent completed the code that allows processing Sentinel-2 time series. Even if atmospherically corrected Sentinel-2 data are not yet available above the whole France, we used the […]