=> CNES is organizing a one day meeting about SPOT4(Take5) on October the 2nd, in its premises in Toulouse. This meeting is aimed at explaining how the experiment turned out and at presenting the available data set. These presentations wil take place during the morning and the afternoon will be dedicated to presentations of users projects […]
=> The CNES teams of the THEIA Land Data Center have reprocessed the SPOT4 (Take5) data, in order to take into account a large number of images that were not processed in the first place, because some data had not been yet received or because their processing had failed due to a few little bugs. The […]
=> I just took a work break in the middle of my holidays, but as I was away, we received a few feedbacks from users, and CNES PTSC teams, with Mireille’s help at CESBIO verified the data sets released on July the 16th, in quite a rush… They found out that a few scenes were missing. […]
=> 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 […]
=> Phew ! These last days were quite intense, but we did it (almost) ! We are very proud to announce that the first version of SPOT4 (Take5) will be released on Monday the 15th of July at the following site : https://www.ptsc.fr/en/products/spot4-take5. The data format is explained here.It will be possible to download the […]
=> Now that all SPOT4(Take5) images have been processed (pfew !), we can make an appraisal of the performances. Let’s start by the geometry, which caused us a lot of trouble : Here are the observed performances for 3 very different sites : Conclusions We have obtained very good results for most […]
=> Before the distribution starts at the land data center (before mid July, or even sooner), I have updated all the quicklooks of all the images taken during the experiment. I have checked in the catalog to see if a few images had not been forgotten. I found about 20 images (on a total of […]
=> The last imaged acquired by SPOT4 were taken on the 19th of June, in the framework of Take5 experiment. It is with some sadness that we see the end of this very intense experiment : SPOT4 de-orbitation started and the satellite will be switched off on June the 29th 2013. SPOT4 will burn in […]
Cette série d’images a été acquise au Paraguay du 10 mars au 09 mai. On y voit clairement le démarrage des cultures, passant du sol nu (rose) au plein développement (vert vif). This image time series was acquired in Paraguay, from the 10th of March to the 9th of May. The start of growing season […]