Our MUSCATE ground segment just passed a new milestone, with 40 000 L2A products processed with MAJA ! Last week was a bit difficult, with a new repetition of the Friday Night Bug (on Saturday morning this time), followed by a "NFS" issue on CNES computing center that blocked production during two days. We are sorry for those of you waiting for the data in near real time. The production has resumed last Friday. These days, our production includes the near real time production and the processing of data acquired in 2016 over Spain, Italy, Switzerland and Netherlands. Some parts are already available, Burgos in Spain for instance, the others should come soon.
The version 2.4 of MUSCATE is nearly ready, but a final bug, noticed during the qualification tests remains to be corrected. As soon as it is installed and checked, this version will bring several improvements :
I just came back from Valencia, where I attended the fifth edition of the Recent Advances in Quantitative Remote Sensing Symposium. It is one of my favourites, thanks to an amazing team of organizers led by Jose Sobrino. It is a unique symposium, because it has only one session where you can even see opticians listen to radarists, or passive microwaves experts share ideas with active microwave experts ! Every three years, it is a way to gather quickly a good sense of the advances in each domain of remote sensing, over lands mainly. Next RAQRS will happen in 2020 in Valencia, and no doubt I'll be there, and not only for the delicious coffee breaks or for the giant paella.
Of course, my talk, available here or visible below, was about Sentinel-2 L2A products, including cloud detection and atmospheric correction. This time, I focused on product validation and provided a lot of validation results obtained by our little team at CNES and CESBIO, with special thanks to Camille Desjardins (CNES) and Bastien Rouquié (CESBIO) and Magdalena Main-Knorn (DLR). I also provided a comparison of MAJA and Sen2cor for various criteria that all show the benefits of using multi-temporal information, as done in MAJA. Despite all that, and although these results were perfectly known by ESA, ESA decided to stick with Sen2cor in their production, supposed to be global next year. The slides explain how this decision was made.
Anyway, as you probably know, you can access MAJA products from Theia, or you may also download MAJA's executable (if you have a powerful linux computer).
Yesterday, MUSCATE facility at CNES produced 1141 Sentinel-2 L2A products in a day, while the previous record was 762. A few glitches had reduced the production on the previous days, and yesterday allowed us to catch up the back log. At the same time we have started producing data acquired in 2016 for several zones outside Europe and Africa. The total number of L2A products in MUSCATE now amounts to 33071. Congrats and thanks to the development and exploitation teams !
Hier, le centre de traitement MUSCATE au CNES a traité 1141 produits de niveau 2A de Sentinel-2, alors que le record précédent était 762. Quelques petits soucis avaient retardé la production ces derniers jours, et c'est hier que nous avons rattrapé le retard, et en même temps lancé la production des données acquises en 2016 sur un grand nombre de zones hors Europe et Afrique. Le nombre total de produits de nievau 2A atteint maintenant 33871. Félicitations et un grand merci aux équipes de développement et d'exploitation !
Done ! All Sentinel-2 data acquired above Italy, Switzerland and Austrian Alps, and processed at level 2A, are now available on Theia website! The data format is described here. We would be very thankful if users in Italy or Switzerland could help us spread the news among remote sensing users in both countries.
The level 2A product provides surface reflectances with a good cloud and shadows mask. The processing is done at CNES, within MUSCATE facility, using the MAJA software, developed by CNES, CESBIO and DLR. The production started with data acquired in December 2016, and will go on in near real time.
That's bad luck, just before the long week-end of the 15th of August, ESA Sentinel-2 ground segment failed and ceased production. This explains why Theia ground segment is not producing in real time anymore.
Pas de chance, le segment sol de Sentinel-2 À L'ESA est tombé en panne juste avant le week-end du 15 août. Ceci explique pourquoi la production de Theia ne s'effectue plus en temps réel.
As a consequence of a ground segment contingency occurred at Matera station, the publication of Sentinel-2 products in the data hubs is temporarily interrupted as of today 11 August. The anomaly is under investigation and the data dissemination is expected to resume by mid of next week.
It is a well deserved recognition for the land cover product developed at CESBIO : NASA's earth observatory blog dedicated its "image of the day" blog post for the 15th of August to this product.
This work was done in the framework of Theia, using iota2 free software also developed at CESBIO. Thanks to the information conveyed by time series,iota2 is a fully automatic processor.
Jordi Inglada's team first published in 2015 a land cover map based on LANDSAT 8 data acquired in 2014, with a 30m resolution.This production was followed, in 2017 by a new map, based on Sentinel-2 data, acquired in 2016, at 10m resolution.
C'est une reconnaissance bien méritée pour le produit d'occupation des sols OSO développé et produit au CESBIO : le blog "earthobservatory" de la NASA a consacré son article "image du jour" du 15 août à ce produit.
Ce travail a été conduit dans le cadre de Theia, avec le logiciel libre iota2 développé au CESBIO. Grâce à l'utilisation de toute l'information contenue dans les séries temporelles d'images, la chaîne iota2 arrive à fournir un résultat de grande qualité, tout en étant complètement automatique.
L'équipe de Jordi Inglada a publié une première carte en 2015, basée sur les données LANDSAT 8 acquises en 2015, avec une résolution de 30m. Cette production a été suivie, début 2017, d'une carte basée sur les données Sentinel-2, acquises en 2016, cette fois à une résolution de 10m.
=> Sentinel-2 data acquired above Spain and Netherlands are now available on Theia website! Portugal was already available. We also completed the little part of Belgium that was missing. The level 2A product provides surface reflectances with a good cloud and shadows mask. The processing is done at CNES, within MUSCATE facility, using the MAJA software, developed by CNES, CESBIO and DLR.
=> Los datos del satélite Sentinel-2 sobre la península ibérica, procesados al nivel 2A, ahora están disponibles en el sitio web de Theia ! El producto de nivel 2A ofrece reflectancias de superficie, después de una corrección atmosférica, con una buena mascara de los nubes y de sus sombras. El procesamiento es hecho en CNES (el Centro Nacional de Estudios eSpaciales), con el software MAJA, desarrollado por CNES, CESBIO y DLR.
Just before the holiday period, we are very happy to tell that all the sites that had been selected by Theia for the production of Sentinel-2 Level 2A products are now in production within MUSCATE. for Theia Land data center. The number of tiles processed each days often tops 400 ! Only a couple of sites need a few more days to be completed.
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But that's not the only good news : given we have some production margins, we are going to add 200 tiles in Europe : Spain, Portugal, Italy, Netherlands, Belgium, Luxembourg, Switzerland, and small parts of Germany and Austria will be included in Theia's production. The new tiles, which appear in red in the image above, will be available in August, starting from images acquired in December 2016. We are also talking with other partners to generalize MAJA processing over Europe.
Finally, regarding Sentinel-2B, a few weeks will be necessary 1) to get some rest, 2) check the quality of our products. S2B data release from Theia should happen in September.