We received satellite images of Antakya, Turkey acquired by Pléiades 10 days after the earthquake. The comparison with pre-event imagery leaves me speechless. The post-event images were acquired by Pléiades PHR1A thanks to CNES Cellule d’Intervention et d’Expertise Scientifique et Technique nouvelle génération : CIEST² (https://www.poleterresolide.fr/ciest-2-nouvelle-generation-2/). I rectified the raw images using the SRTM digital […]
Sentinel-1A acquired an image three days after the Mw 7.8 earthquake which struck Turkey and Syria on Feb 06. The magnitude and the extent of the displacement is hard to believe (+1m vertical displacement, 100 km) but follows well the East Anatolian fault and the shakemaps generated from in situ seismic instruments. Caution: these results […]
The low predictability of agricultural cycles in semi-arid regions [1]. In the early 2010s, chaotic attractors were captured for the cycles of cereal crops in North Morocco. This result was unexpected for several reasons. It was the first time a chaotic attractor was obtained from remote sensing data. It was also the the first « weakly dissipative » […]
International news media reported that the Joshimath city in north India (Uttarakhand) was « sinking » due to a slow landslide. In January, many houses had developed major cracks on the walls and 145 families were temporarily moved. The Indian space agency published a map of the ground deformation obtained by SAR interferometry using Sentinel-1 data. Although […]
The full reprocessing of VENµS VM1 data acquired between end 2017 and end 2020 has just been completed, with improvements for the Level 1C and level 2A processing. The data can be downloaded from the Theia website : https://theia.cnes.fr by clicking on VENµS VM1 (The data from VENµS new on-going phase, with a revisit of […]
In early January 2023 the snow cover area in the Alps was lower than the 30 years minimum. The snow cover area in January 2023 was lower than the snow cover area last year at the same period. This caused the publication of a lot of depressing ski resorts photographs. But the ongoing snowfalls in […]
iota2 is the large scale mapping software developed at CESBIO. iota2 takes high resolution satellite image time series (SITS), usually Sentinel (1 and 2) or Landsat, and produces maps over large areas. Maps of most usual variables of interest in remote sensing can be produced, since iota2 can compute user-defined functions at the pixel level, […]
B-22A is the largest iceberg in the Amundsen Sea, Antarctica (50 times Manhattan land area). It broke off from Thwaites Glacier’s tongue and remained grounded for 20 years.. But now it’s on the go, as shown by this animation I made from Sentinel-1 SAR images (about 1 per month since June 2015, total 75 frames): […]
J’étais hier dans la maison du parc naturel régional des Pyrénées Catalanes pour discuter des possibilités offertes par la télédétection pour suivre le manteau neigeux. Les participants à la réunion représentaient bien les différents usages de l’eau dans ce territoire (milieux naturels, agriculture, eau municipale, hydro-électricité, domaines skiables). Tous ont exprimé le besoin de mieux […]