Applications
=>En ce moment, Mireille Huc, du CESBIO, passe beaucoup de temps a essayer d’améliorer la détection des ombres de nuages appliquée aux séries temporelles. Notre méthode MACCS a tendance à oublier beaucoup d’ombres lorsque celles-ci sont partiellement cachées sous le nuage. Nous vous expliquerons dans un prochain article les défauts de la méthode actuelle et […]
Applications
=> These days, Mireille Huc is spending a lot of time to enhance the cloud shadow detection method applied to time series. Our MACCS method tends to forget some shadows when they are partly hidden under the cloud. We will explain in a future article the defects of the present method and how we will […]
En Français
=> Maintenant que Sentinel-2A a commencé à acquérir des séries temporelles d’images sur l’Europe, nous avons pu tester notre chaîne de niveau 2A, MACCS, pour faire des corrections atmosphériques. Comme vous le savez probablement si vous avez suivi ce blog, MACCS travaille avec des séries temporelles d’images, pour détecter les nuages,les ombres, l’eau et pour […]
CESBIO
=> Now that Sentinel-2A has started to acquire time series over Europe, we have been able to try our MACCS Level 2A processor to perform atmospheric corrections. As you probably know if you have been following this blog, MACCS works with time series to detect clouds, shadows, water and estimate aerosols optical thickness. Our processor therefore […]
Applications
During the summer, the processing of SPOT5 (Take5) started to be updated weekly by THEIA processing Center in CNES. There is now a production lag of only 3 weeks, and the latest date available on the server was acquired on the 12th of August. If you have been using these data, and had interesting preliminary results, or […]
In English
Twice a year, there is a Landsat Science Team meeting, organised by USGS. One day is dedicated to LANDSAT news, and one or two days to the science team presentations. And what is good, is that the slides are made available just after the meeting. It is a good way to get news from LANDSAT, and […]
In English
=>Le CNES vent de décider de prolonger l’expérience SPOT5 (Take5) d’une semaine, jusqu’au 15 septembre. Cette prolongation généreuse compensera les deux pertes de données rencontrées au cours de l’expérience. Grâce à cette prolongation, nous aurons bien 5 mois de données pour chaque site, et environ 30 acquisitions par site. A l’issue de l’expérience, Sentinel-2 devrait […]
In English
=> CNES just decided to extend the SPOT5 (Take5) experiment by one week until the 15th of September. This extension is a generous compensation for the loss of two periods of acquisition : Thanks to this extension, we will still get 5 complete months of data for each site, and about 30 acquisitions per site, every […]
In English
The programming of the 2nd and 3rd of August acquisitions failed for a complex reason which is now understood, and should not happen again. Please remember that the programming is done fully manually, as SPOT5 is not on its nominal orbit and that it requires a lot of work from the teams at CNES to […]