THEIA

A 10 m resolution land cover map of Sahel with iota2

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, […]

09.01.2023

Feedback on hydrological monitoring of Telangana region in India using remote sensing

=> Claire Pascal, PhD student at CESBIO, under the supervision of Olivier Merlin (CNRS researcher) and Sylvain Ferrant (IRD researcher) brilliantly defended her thesis on the monitoring of water resources by satellite on November 18. Claire’s work focused on the Telangana region of India where rainfed cotton and flooded rice farming dominate. The region has […]

01.12.2022

Retour d’expérience sur le suivi hydrologique d’une région Indienne par télédétection

=> Claire Pascal, doctorante au CESBIO, sous la direction d’Olivier Merlin (chercheur CNRS) et co-dirigée par Sylvain Ferrant (chercheur IRD) a brillamment soutenu sa thèse sur le suivi des ressources en eau par satellite le 18 novembre. Les travaux de Claire se sont focalisés sur la région du Telangana en Inde où la culture non […]

10.11.2022

[THEIA] Near real time production of Sentinel-2 images has resumed

Due to Brexit,  the ECMWF moved some of its computer infrastructure from Reading (UK) to Bologna (IT), and a 5 week interruption of service occurred for the production of Copernicus Atmosphere Monitoring Service. As our Level 2A production for Sentinel-2 uses this information to set the type or aerosols for the atmospheric correction, we had […]

02.11.2022

Sample images from VENµS new phase are available

Here are some long awaited news about the VENµS VM5 phase. The acquisitions started end of March 2022 with the following list of sites, and should go on for at least one year, and maybe more depending on the consumption of fuel (Hydrazine) to maintain the orbit. Most of the sites are acquired with a […]

Effet de la sécheresse 2022 sur la durée d’enneigement dans les Parcs Nationaux

A partir des produits neige Theia, j’ai calculé la durée d’enneigement entre le 1er juin et le 31 août à 20 m de résolution spatiale pour chaque année depuis 2017 dans les zones cœurs des quatre Parcs Nationaux français de haute montagne (Pyrénées, Vanoise, Écrins, Mercantour). A titre d’illustration voici la comparaison entre l’été 2022 […]

14.09.2022

After 6 years of Copernicus data, I have never seen France that yellow

=> What can we say, except that the vegetation situation in France has worsened significantly in July 2022 compared to an already alarming June. The monthly syntheses of Sentinel-2 for the month of July are available since a few days, and the comparison with previous years shows an exceptional drought on the whole territory. Only […]

02.09.2022

In June 2022, drought spreads to all South Western Europe and Maghreb

=> 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 […]

02.08.2022

Dès juin 2022, la sécheresse s’étend à l’échelle continentale

=> 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, […]

Rechercher