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 […]
Applications
=>Vous connaissez déjà la chaîne iota2 et vous savez qu’elle sait traiter les séries temporelles Landsat8 et générer des cartes d’occupation des sols. Ces derniers jours, Arthur Vincent a terminé le code permettant d’utiliser les séries temporelles Sentinel-2. Même si nous n’avons pas encore des séries Sentinel-2 sur toute la France (mais elles devraient arriver bientôt), nous […]
Applications
Dave Petley wrote a nice article in the AGU’s Landslide blog about a massive landslide in Glacier Bay, Alaska. This huge avalanche of debris was spotted by a local pilot Paul Swanstrom on June 28. When Paul was above it, « dust was still flying ». Later, based on earthquake records in Alaska, the experts figured out […]
Applications
=> Over the last months, we worked a lot on our method for Land Cover map production. Three main topics (1) were studied with Arthur Vincent and David Morin at CESBIO : porting and validating the iota2 processor on the CNES High Performance Computing facilities (HPC); enhancing the method for reference data preparation. Reference data […]