=> Airplanes largely disrupt our remote sensing images, because of the ice contrails they leave behind them, which often turn into cloud cover. We had to set up a method for detecting and correcting aircraft contrails. LANDSAT 8 image acquired over Paris on 14/04/2013. On the left, RGB color composition, on the right, image of […]
Tout s’est très bien passé ce matin, et SPOT5 a atteint sa nouvelle orbite, 2,5 km plus bas. Félicitations et un grand merci à toute l’équipe des opérations du CNES ! Les premières images seront acquises la semaine prochaine. Ne quittez pas ! On m’a de nouveau demandé comment un petit changement d’altitude de 2 […]
=> How to go from 1 image every 5 days to 24 images per second ?It was possible, thanks to CNES funding, thanks to an imaginative producer, Gérard Dedieu (who does not smoke cigars yet), thanks to a talented film director and scenarist, Thierry Gentet (the only film director who understands space mechanics), and thanks […]
=> 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 […]
(Version Française) Orbit Change Tomorrow, January the 29th at night, the altitude of SPOT4 will be lowered by 2.5 km. This operation is not far from the regular manoeuvres of orbit control and should not be risky. During the night, the orbit parameters will be measured and checked by our colleagues of the Operations Sub […]
(english version)(mise à jour du 29 janvier 2013, Vous pouvez aussi consulter le calendrier des observations.) Quel jour ? Sur chacun des 42 sites de l’expérience Take5, SPOT4 fera une acquisition tous les 5 jours. La manœuvre de changement d’orbite aura lieu le 29 janvier et dès les premiers jours de février, probablement même le […]
(French Version) When we submitted the SPOT4(Take 5) experiment to CNES, we knew that CNES would not accept it easily, since a similar proposal made by Gérard Dedieu before SPOT2 de-orbitation had been rejected. But we did not imagine the amount of work we were requesting from our colleagues at CNES. To show the project […]