After a good period with very little production incidents, our Muscate facility has had a tough period, which almost halted the production for one week. Until last week, the Muscate ground segment was running on CNES older cluster, and was just using the new cluster's bay of disks to store the input and output data. The access to the bay was made through the network and slowed the processing. Last week, we moved Muscate to the new cluster, and also moved physically one of the computers we are using : this brought us a few surprises that took more time than expected.
Muscate is now running on the new cluster : it has its own reserved computing nodes, and a dedicated facility for the scheduler. The result is that the processing of a L2A product with MAJA now only takes 23 minutes on average, while it used to be 50 minutes before. All the teams who did that migration, handling the development of Muscate, its exploitation, or the cluster facility, deserve acknowledgement !
These Sentinel-2 images show the extent of the recent flooding near the border between Arkansas and Missouri on Apr 24, 2017 (36°30'N 90°38'W). The left image is a natural color composite (similar to what our eyes could see if we were in orbit). The right image is a color representation of the Normalized Difference Water Index (NDWI).
The Google Earth Blog spotted the recent Queensland floods in Sentinel-2 imagery.
The Sentinels provide systematic coverage of the land areas, which facilitates the detection of changes due to natural hazards. Hence we can compare this Sentinel-2A image with another one that was captured last year during the same season to better highlight the extent of the flooded areas.
Texas had the super bowl in 2017 but California got the super bloom!
After its worst drought in 1,200 years, California is now experiencing one its wettest year. The Sierra Nevada snowpack is currently one of the biggest ever recorded. In February, severe winter rainfalls caused the evacuation of many California residents under the threat of the Oroville Dam failure.
Now, this unusual level of rainfall triggered the blossoming of flowers that were in a dormant state. The Washington Post collected some photographs and noted that it was so so massive that you can see it from space (images were provided by Planet, a California-based remote sensing company).
How does it look like in Sentinel-2 imagery? Below is the comparison between two Sentinel-2 images acquired in spring 2016 vs. spring 2017 near the Carrizo Plain National Monument (see by yourself in the sentinel-playground).
We know that fast distribution of satellite products is critical for many applications, including the planning of your next weekend.
Olivier just announced that Theia is now delivering Sentinel-2 Level 2A data in near real time. This is great because today I was able to make the snow cover map of the Pyrenees on Sunday at 20-m resolution.
The L2A image was actually published on Tuesday afternoon so I could have posted this snow map two days ago.
The number of L2A products from Sentinel-2 available at Theia, just passed above 10 000 ! Data from France, Belgium, North of Spain, Morocco, Tunisia, Senegal, the Burkina-Mali transect, or La Reunion Island are now processed in real time : our requirement is 60 hours, after the data is available in Copernicus hub. Next site to be added is Madagascar.
Le compteur de produits de niveau 2A de Sentinel-2, disponibles à Theia, vient de passer la barre des 10 000 produits. Les données acquises par Sentinel-2 sur la France, la Belgique, le Nord de l'Espagne, la Tunisie, le Sénégal, le transect Burkina Mali, et l'île de la Réunion sont maintenant traitées en temps quasi réel : notre spécification est de les mettre à disposition en moins de 60 heures après leur apparition sur les serveurs du hub de Copernicus. Le prochain site couvrira une bonne partie de Madagascar.
One year of Senegal S2A L2A data available at https://theia.cnes.fr/atdistrib/rocket/#/search?q=Senegal&?lang=en
Une année de données S2A de niveau 2A sur le Sénégal disponibles depuis https://theia.cnes.fr/atdistrib/rocket/#/search?q=Senegal&?lang=en
The production will progressively be extended over the whole France and over the other sites (Spain, Morocco, Belgium Tunisia, Senegal, Burkina, Mali...) and then follow the real time acquisitions with the shortest delay possible.
La production par MUSCATE des données de niveau 2A de Sentinel-2 s'approche du temps réel, et les données acquises jusqu'à mars 2017 sur la France et l’île de la Réunion ont commencé à apparaître sur le serveur de distribution.
La production va être progressivement étendue à toute la France et aux autres sites (Espagne, Maroc, Belgique Tunisie, Sénégal, Burkina Faso, Mali...), et suivra ensuite les acquisitions en temps réel avec le plus court délai possible