In English
=> Kilauea Volcano in the largest active volcano in Hawaii and one of the most active on Earth. It has been erupting for over 30 years now but hit the headlines recently because a large lava flow traveled up to the ocean, adding 2 brand new hectares to the Hawaiian Islands.
Non classé
=> It is with a deep nostalgia that I learned that Formosat-2 has just been decommissionned, after some of its components broke down after 12 years of acquisitions (nominal life extended by 8 years !). When the satellite was launched, we were searching for data sets that would allow us simulate the features of VENµS satellite (which […]
En Français
=>C’est avec nostalgie que je vous fais part de la fin d’exploitation du satellite Formosat 2, dont un certain nombre de composants sont tombés en panne récemment, après 12 ans de fonctionnement (8 de plus que prévu). Au moment de son lancement, nous cherchions des données nous permettant de simuler les caractéristiques du satellite VENµS (prévu pour […]
In English
After reading my previous post about the Rutog ice avalanche, my distinguished colleagues Antoine R. and Olivier H. challenged me to look for a pre-event image to better highlight the avalanche area. The closest clear-sky image that I could find is a Landsat-8 image that was acquired on June 24 (23 days before the slide).
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 […]