=> Since a few years, my colleagues from THEIA project and from the data campus at CNES, started designing a new processing and distribution center, named Hysope-II. This centre was initially set up for products related to hydrology. It includes a processing center, a catalog, and a distribution center (hydroweb.next). It was developed in the […]
The Copernicus Atmospheric Monitoring Service (CAMS) is about to release a new version of its aerosol products on 27 June 2023, referred as 48r1. Their evolution has a direct impact on MAJA, and requires us to adapt the processor. MAJA will not be ready to support 48r1 before the next MAJA release scheduled for September […]
The Kakhovka Reservoir was created in 1956. As the level of the reservoir drops at a staggering rate of two meters per day, it is now possible to see the ancient river reappear in satellite images. I have georeferenced a 1943 German military map published by Defense Express in their article « 1943 Maps Show What […]
Whether you are a user of the atmospheric correction processor MAJA or THEIA’s Sentinel-2 Level 2 products, you will probably be interested to read our new article on the validation of MAJA Sentinel-2 surface reflectances. The article is published in open access in Remote Sensing : Colin, J.; Hagolle, O.; Landier, L.; Coustance, S.; Kettig, […]
People often ask if we can detect artificial snow in satellite images. It’s not so easy except when the surrounding slopes are totally snow-free… But recently, I noticed some anomalous snow accumulations patterns in a satellite-derived map of the snow depth near Super Barèges ski resort (Pyrenees). This map was computed at 2 m resolution […]
=> Recently, I agreed to review the following paper, which is now online: https://www.mdpi.com/2072-4292/15/7/1827 The paper had 3 reviewers. I opted for signed, public review so you can find my review for the first round here. As you can see, I had quite a lot to say about this paper, which to my opinion required […]
Downloading time series from Theia can take a while, depending on the area and the time period covered by the images. Also, it consumes a lot of storage locally, since all the archives in .zip format have to be downloaded (the GeoDataHub will probably distribute Cloud Optimized Geotifs). From my experience, a lot of people […]
We have had to cancel the production of VENµS L1C and L2A products for one month, because the footprints of VENµS images tend to change more than anticipated. The ground segment recognizes the sites by the coordinates of the corners, and the tolerances were not large enough. This problem has been understood and corrected by […]
In Turkey, the Disaster and Emergency Management Presidency (AFAD), affiliated to the Ministry of Interior, has completed the installation of 300 thousand tents in the provinces affected by the earthquakes. On Feb 16, Pléiades captured such installation on the parking of the New Hatay Stadium near Antakya. I count about 400 tents in this picture. […]