Pre-processing (geometry, atmosphere, clouds)

Le traitement des données Sentinel-2 L2A au Sahel progresse

=> Comme nous l’avions annoncé en Novembre, le centre de production MUSCATE de Theia rajoute progressivement des zones au Sahel, qui sont affichées sur l’image ci-dessous. Les données sont traitées à partir de décembre 2016, ce qui nous fait une grande quantité de données à traiter. Nous avons donc commencé avec les tuiles les plus […]

10.09.2019

THEIA’s Sentinel-2 L2A processing on Sahel is progressing

=> As we had announced in November, the MUSCATE production centre in Theia is gradually adding areas in the Sahel, which are shown in the image below. The data are processed from December 2016 onwards, which means that we have a large amount of data to process. We started with the most westerly tiles, in […]

[How it works] Can reflectances be greater than 1 ?

=>  Beware, this document contains equations Having written a lot of posts in this blog, twitter or linkedIn, or due to the distribution of products and softwares on Theia or Github, Users of these channels questions per week in one of these channels, which I try to answer, even if not always at once. Many […]

03.09.2019

EEA 34 countries and corresponding Sentinel-2 tiles

MAJA and LIS selected for the next Pan European high resolution snow and ice monitoring service

The European Environment Agency (EEA) has selected a consortium led by Magellium to implement the next Pan European high resolution snow and ice monitoring of the Copernicus Land Monitoring Service. This future service aims to monitor three variables at 20 m resolution over the tiles displayed above: All products should be generated from atmospherically corrected […]

27.06.2019

Plus de 1000 téléchargements en deux ans pour le code de correction atmosphérique MAJA

=> Nous avons commencé à distribuer MAJA gratuitement en juillet 2017, il y a moins de deux ans, et le logiciel a déjà été téléchargé plus de 1000 fois (1068 précisément aujourd’hui). Cela représente en moyenne plus de deux téléchargements par jour de semaine, et ces dernières semaines, nous avons atteint environ 4 téléchargements par […]

15.06.2019

More than 1000 downloads of MAJA atmospheric correction software

=> We started distributing MAJA as a free software in July 2017, less than 2 years ago, and it already reached 1000 downloads (1043, as a mater of fact).  MAJA was in fact downloaded twice per working day, and in the very last weeks, we had about 4 downloads a day ! Of course it […]

10.06.2019

Sen2Agri final version was just published

The Sen2Agri system was just released in version 2.0. As the project is now terminated and will not receive more funding from ESA, V2_0 is the final version, apart maybe for a few bug fixes. Sen2Agri is a very complete ground segment that automates download and processing of Sentinel-2 data to obtain multi-temporal syntheses, crop/non crop, […]

30.05.2019

MAJA 3.3 is available, with a LOT of improvements

What’s new ? Pfew ! It has been quite long, but MAJA 3.3 is available, and it improves a LOT of things ! Moreover, when we validated the results, we figured out that one of the parameters in our settings had a wrong value (10 instead of 1). It is easy to make such errors, […]

08.05.2019

Spot the odd one out

=> There is an odd image in this time series of L2A products of the 31TCJ Sentinel-2 tile (Toulouse region). Can you guess which one ? Yes it is the last one, acquired on the 26th of February. But what’s odd with it ?

22.04.2019

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