=> The fourth edition of the RAQRS (Recent Advances in Quantitative Remote Sensing) Symposium took place in Valencia (Spain) two weeks ago. This symposium happens every forth year, is perfectly organised by J.Sobrino and his colleagues at University of Valencia. It aims at showing the last advances in remote sensing for land surfaces, in all […]
=>La quatrième édition du colloque RAQRS (Recent Advances in Quantitative Remote Sensing) s’est déroulée à Valencia, en Espagne, il y a deux semaines. Ce colloque a lieu tous les 4 ans, il est parfaitement organisé par J.Sobrino et ses collègues de l’Université de Valencia. Son objectif est de passer en revue les dernières avancées […]
In a classical Hollywood thriller, in which the hero nearly dies several times, a last sequence of the film is usually dedicated to the happy ending with a swinging music. The same happens with the SPOT5 (Take5) story : after several periods with very little hopes of success, the SPOT5 (TAKE5) experiment is finally close […]
=> Sentinel-2 orbits The Sentinel-2 orbit was set so that the swaths observed by the satellite have a little overlap at the equator. The width of the overlap increases quickly at higher latitudes. For instance, at France latitude (45 degrees), about half of the surface will be observed twice per satellite cycle, from two adjacent […]
CNES just gave a green light to go on with the studies to repeat the Take5 experiment with SPOT5. These studies will determine the exact cost of the experiment and see if it fits with what could be available, accounting for ESA’s help. If everything goes well, the experiment would start around April 2015, until […]
=> As we are working to set-up a new Take5 experiment with SPOT5, here are some explanations of how it is possible to change the repeat cycle of a satellite from 26 days to 5 days, by just changing the satellite altitude by a couple of kilometres. There is nothing complicated behind that, just some […]
=> En ces jours où l’on reparle d’une expérience Take5 avec SPOT5, je m’aperçois que je n’ai pas expliqué ici comment on arrive à faire passer le cycle orbital de SPOT de 26 à 5 jours exactement, en abaissant l’orbite de SPOT de seulement 3 kilomètres. Il n’y a en fait rien de sorcier là […]
=> 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 […]
=>Cet article est régulièrement mis à jour avec l’arrivée de nouvelles (la date officielle de lancement de Sentinel-2), ou l’ajout de nouveaux arguments. SPOT5 aussi va bientôt terminer sa carrière. Après 12 ans d’acquisitions d’images, le satellite va prendre sa retraite en 2015. Le CNES pourrait donc lancer prochainement un appel à utilisation scientifique de […]