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=>La production des données de niveau 2A de Sentinel-2 se poursuit au CNES, mais un peu moins vite que prévu pour le moment. Nous avons connu un jour faste pendant lequel 600 tuiles ont été produites, mais le rythme de production a souvent été plus lent : nous avons résolu progressivement de petites anomalies et […]
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=> The production of Sentinel-2 L2A data is on-going at CNES THEIA, but it is still a little slower than expected. We had one fast day on which the exploitation team managed to process 600 tiles, but the production has often been slower as we needed to solve a few glitches, and as the whole […]
In English
Sentinel-2A was launched on 23-July-2015 but the routine operations started in July 2016 after the ramp-up phase [1]. Now with the onset of the austral summer, the first Sentinel-2A images of Antarctica are getting available (except for Dome C, which is a calibration site).
In English
Today for lunch I went to a Japanese restaurant near the university with my wife and our oldest son. We discreetly debated whether the owners were actually Japanese because we could recognize some words in Chinese when they were speaking. However, in the main room there was a tapestry of the majestic snow-capped Mount Fuji, […]
En Français
Depuis deux mois, nous distribuons les données Sentinel-2 de niveau 2A sur la France sur le centre de traitement MUSCATE. Les données sont produites par le CNES, pour le compte de THEIA et disponibles à l’adresse ci-dessous : https://theia.cnes.fr/atdistrib/rocket Mais ces données étaient jusqu’ici produites selon le plan B : sur une plate-forme de […]
fire
At the beginning of summer, a colleague in Igarka (Maxime Deschuyteneer ?) informed me on 20th of July that a forest fire up to the city was responsible, according to him, of “a small greenhouse effect that make you cough”…Indeed, forest fires are recurring problems in Central Siberia, mainly during June and July because of […]
In English
I was asked recently to show the activities of Theia, the French Land Data center, related to Sentinel-2, in a meeting of the EuroSDR, a gathering of the national mapping agencies. Here is what I showed :https://www.cesbio.cnrs.fr/multitemp/wp-content/uploads/sites/11/2016/11/O_Hagolle_Theia_Sentinel-2.pdf
Applications
On Monday Nov 14 New Zealand was hit by an earthquake of magnitude 7.8. The epicenter was located near Kaikoura on the east coast of the South Island. Yesterday, the NZ Herald published aerial photographs showing tectonic uplift of the seabed of between 2 and 2.5 metres north of Kaikoura [1]. These photos were taken by […]
Comment ça marche /how it works
=> Beware, this document contains equations. Radiometric quantities are numerous and may seem rather complex at first sight. Here is a little guide of the various quantities you might stumble upon when using optical remote sensing data. It might be a little boring, it is full-up with integral formulas, but well, to really understand what […]