CO3D

Satellite Stereoscopy for Water Resource Monitoring?

=> In arid or semi-arid regions, where irrigation is widespread, monitoring agricultural water resources is essential to anticipate shortages. These resources may come from large dams, small reservoirs, or groundwater aquifers. This is the case in the state of Telangana, in South India, where numerous large dams (shown in cyan blue in the figure below) […]

19.02.2025

La stéréoscopie par satellite pour le suivi des ressources en eau ?

=> Dans les régions arides ou semi-arides, où l’irrigation est généralisée, le suivi de la ressource en eau agricole est primordial pour anticiper les pénuries. Cette ressource peut-être l’eau de grands barrages, de petits réservoirs ou provenant de l’aquifère. C’est le cas de l’état du Télangana, en Inde du Sud, où de nombreux grands barrages […]

12.02.2025

Glacier changes in the Lingtren–Khumbutse catchment using Pléiades

The iconic Khumbu Glacier in Nepal is fed by several tributaries, such as this branch in the Lingtren–Khumbutse catchment. Recently a new Pléiades triplet covering the Khumbu region was added into the DINAMIS repository (acquisition date 22 Oct 2023). There is another triplet in the same area acquired on 11 Mar 2016 hence we can […]

13.11.2023

Kyrgyzstan glacier collapse. New Pléiades and SPOT7 images tell us more…

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 […]

22.07.2022

Kyrgyzstan viral avalanche. First views of the glacier scar using Pléiades images

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 […]

12.07.2022

Towards 3D time series

=>  In our a priori definition of Sentinel-HR mission, we had included an option to observe the 3D topography at a high resolution, with a moderate accuracy ambition (lower than that offered by the  CO3D satellite, as shown in the table below), but globally and with a systematic revisit. But our mission advisory group insisted, […]

09.04.2022

Du relief pour nos séries temporelles

 => Dans notre définition initiale de la mission Sentinel-HR, nous avions inclus une option permettant d’observer le relief à haute résolution, avec un objectif de précision modéré (inférieur à celui offert par CO3D, comme le montre le tableau ci-dessous), mais avec une revisite systématique et sur le monde entier. Devant l’intérêt des membres de notre […]

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