CESBIO
=> While Italy or Morocco have been alarmed for months, the drought has spread in June to all southwestern Europe (calling Brittany « southwestern » is a bit risky, I admit). The surface reflectance syntheses from Sentinel-2 have been delivered for the month of June a few days ago (I was on holidays), and the comparison with […]
CESBIO
=> Alors que l’Italie ou le Maroc s’alarment depuis des mois, la sécheresse s’est étendue en juin à toute l’Europe du Sud Ouest (qualifier la Bretagne de « Sud Ouest » est un peu osé, je le reconnais). Nous disposons des synthèses de réflectances de surface issues de Sentinel-2 pour le mois de juin depuis quelques jours, […]
3D
Because the first images were partly cloudy, the Pléiades 1A and 1B satellites (CNES/Airbus) continued to acquire images over Kyrgyzstan and a cloud-free 0.7-m stereoscopic pair was acquired 16 July 2022. We could also obtain a 1.5 m SPOT7 stereoscopic pair from the Airbus DS archive thanks to the Dinamis initiative. The latter was taken […]
Composite (3A)
Our let-it-snow (LIS) processor computes the extent of the snow cover from Sentinel-2 surface reflectance (level 2 products). However, it can also compute multi-temporal composites (level 3 products) such as the snow cover duration, snow onset and snow melt out date from a time series of snow cover maps with a cloud mask. Aurore Dupuis […]
In English
Collard et al. (2022) have shown that Sentinel-2 can be used to estimate the wave spectrum in the presence sea ice. The waves tilt the sea ice surface and therefore modulate the reflected radiation that is received by Sentinel-2 sensor. The wave spectrum extracted from the image can even be used to invert the wave […]
3D
Last week, Simon Gascoin and I spent quite some time working on the Marmolada event. Just a week-end to rest and Twitter reminded us Monday morning that this summer 2022 was special for glaciers. Not only are they out of balance with the climate and will probably suffer one of their most negative mass balance […]
In English
Colleagues from ESA are reportedly claiming that the cloud masks from the new version v2.10 of Sen2cor are « as good as those of MAJA, if not better ». Well, let’s check. MAJA is the Level2A processor we designed within CESBIO and CNES, to process time series of images such as those of Sentinel-2, LANDSAT, VENµS, TRISHNA, […]
En Français
Ce mercredi 6 juillet, le CESBIO a accueilli les membres de différents CES Theia pour une formation au logiciel Iota². Ce logiciel open-source permet le traitement des séries temporelles issues des missions Sentinel. Cette formation a été organisée dans le cadre du projet CNES TOSCA PARCELLE qui vise à soutenir le développement de Iota2. Quinze […]
3D
The deadly Marmolada glacier collapse happened on 3 July 2022. On 6 July 2022, Pléiades 1B (CNES, Airbus DS) acquired a clear-sky stereo pair of the area. From these images we could estimate a detached volume of ice of 65’000 ± 10’000 cubic meters. First, we generated a digital elevation model (DEM) from Pléiades stereo […]