Pour contribuer à caractériser les conditions hydrométéorologiques lors de la crue torrentielle qui a frappé la Bérarde en juin, j’ai analysé une nouvelle série de cartes d’enneigement qui couvre la période 1984-2024 [1]. Grâce à la profondeur temporelle de cette série, on constate que l’altitude de la ligne de neige dans le bassin versant du […]
The results presented here are based on published work: Y. Zérah, S. Valero, and J. Inglada. « Physics-constrained deep learning for biophysical parameter retrieval from sentinel-2 images: Inversion of the prosail model« , in Remote Sensing of Environment, doi: 10.1016/j.rse.2024.114309. This work is part of the PhD of Yoël Zérah, supervised by Jordi Inglada and Silvia Valero. […]
Last week, I issued a petition to keep S2A operational, this post will give you some results. i will keep updating this post regularly, so please go-on signing the petition or forwarding it to your colleagues. Although I have not been trained as a lobbyist, and I have some regrets on how i did it, […]
The launch of Sentinel-2C (S2C) is scheduled on the 4th of September 2024, next week ! After 3 months of commissioning phase, S2C will replace S2A, to fulfill the Sentinel-2 mission together with S2B. S2B will later be replaced by S2D. The current plans are to keep S2A as a redundant satellite, in case something […]
Le 21 juin 2024, la crue torrentielle du Vénéon et de son affluent le torrent des Étançons a dévasté le hameau de la Bérarde dans le massif des Écrins. Cette crue a résulté des fortes pluies et de la fonte de la neige, et a peut-être été aggravée par la vidange d’un petit lac supra-glaciaire. […]
=> C’est avec une certaine tristesse mais aussi beaucoup de fierté que je vous rappelle que la phase opérationnelle de VENµS se terminera fin juillet après 7 ans de bon travail. La phase d’acquisition actuelle (VM5) s’arrêtera le 12 juillet. Les semaines restantes seront consacrées à quelques expériences techniques (les acquisitions au-dessus d’Israël se poursuivront […]
Enhance button is a very common movies trope, where a character scrolls through some video footage or photos and asks a computer to enhance its resolution to an insane level of details, enabling solving crime mysteries and conspiracies of all sort with clues that were invisible in the original image. While this meme has been […]
The results presented in this blog are based on the published work : I.Dumeur, S.Valero, J.Inglada « Self-supervised spatio-temporal representation learning of Satellite Image Time Series » in IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, doi: 10.1109/JSTARS.2024.3358066. In this paper, we describe a self-supervised learning method to train a deep neural network […]
=> Several data access centres are being renovated at CNES, ESA, and their first versions often lack some of the features we need. Together with colleagues from CESBIO, we have made a presentation of the way we use remote sensing (RS) data: here is a text version of this presentation. Of course, there are as […]