=> This post is regularly updated with news (the official date of Sentinel-2 launch) or to add new arguments. SPOT5 will soon end its career. After 12 years of image acquisitions, the satellite will retire in 2015. CNES might launch a call for scientific experiments with SPOT5 before the satellite de-orbitation. I am quite sure […]
=> CESBIO contributes to an international joint laboratory in Morocco, called TREMA, « Télédétection et Ressources en Eau en Méditerranée semi-Aride », which means « Remote Sensing and Water Resources in Semi-Arid Mediterranean ». This year, this laboratory has embarked on an ambitious experiment of irrigation scheduling by satellite imagery, on a wheat plot near Marrakech. This experiment was […]
=> As explained in the post about atmospheric effects, the scattering of light by molecules and aerosols in the atmosphere brings about several effects : scattering adds some haze on the images (the atmospheric reflectance), lessens the signal from the surface (the atmospheric transmission), and blurs the images (the adjacency effects). This post is about […]
SPOT4 s’est éteint hier soir, le 29 juin 2013, après avoir consommé tous ses ergols pour réduire son altitude. Mais comme avec les grands compositeurs ou les grands auteurs, SPOT4 nous laisse déjà découvrir quelques œuvres posthumes :Nous avons en effet la possibilité d’ajouter 4 sites supplémentaires à la liste des sites Take5 en France. […]
=> Caution ! This post contains formulas ! Aerosols play a great role in the atmospheric effects. Aerosols are particles suspended in the atmosphere, which can be of several types: sand or dust, soot from combustion, sulfates or sea salt, surrounded by water… Their size ranges between 0.1 micron and a few microns, depending on […]
=> Land cover and land use maps Although different, the terms land use and land cover are often used as synonymous. From Wikipedia Land cover is the physical material at the surface of the earth. Land covers include grass, asphalt, trees, bare ground, water, etc. There are two primary methods for capturing information on land […]
(aerosol images have been added at the end of the post)=> The verification of the various steps of our SPOT4(take5) processing scheme is going on. On Thursday, we received our first time series, I orthorectified them on Friday, and we were then able to start testing our level 2A processor with the first time series. […]
(French Version) The THEIA Land Data Centre is a French inter-agency initiative designed to promote the use of satellite data, primarily for environmental research on land surfaces but also for public policy monitoring and for management of environmental resources. Its objective is to foster the use of remote sensing data to measure the impact of […]