=> A new attitude estimation method has been developed for the VENµS satellite, based solely on image content. The registration quality can thus be improved by a factor of 10, paving the way for new applications. Since its launch in August 2018, the Franco-Israeli Venµs pushbroom satellite has been affected by attitude restitution noise that […]
Une seule acquisition VENµS suffit pour estimer le relief de la scène grâce à la technique dite de « stéréo native ». Une des missions principales de VENµS, le satellite franco-israélien lancé en août 2017, est d’acquérir régulièrement des images sur plus d’une centaine de sites scientifiques répartis dans le monde. Sa résolution à 5,3 m par […]
Quand on se balade à la campagne (c’était surtout avant le Covid-19…), ça pique toujours un peu les yeux de voir dans les champs, ces « mauvaises herbes » (ou adventices pour les intimes) devenues toutes rousses, presque du jour au lendemain. C’est pas que je n’aime pas les rousses, mais je préfère quand même […]
Suomi/VIIRS had a nice view of snow in the Alps today, 60 years after the first TIROS image. Thanks to all space agencies for providing us great data to study snow. And thanks to Richard Essery for the tip!
NO2 emissions are rising again over China, showing the slow recovery of Chinese industry after a two-month shutdown. The graph below was obtained from Sentinel-5p data using the NO2 time series Google Earth Engine app.
=> Here it comes ! Following numerous demands, we found ressources to add the great island of Madagascar to the list of zones processed by Theia. The processing with MAJA started a few days ago, with the data acquired in December 2016 by Sentinel-2. The start was only slightly delayed by the current lockdown in […]
=> The L2 products from the Maja chain are regularly evaluated for their quality, whether in terms of cloud detection, optical thickness estimation or surface reflectance estimation. While the validation of the cloud masks is essentially based on the tedious creation of sets of controls (manual or semi-automatic), the estimation of the optical properties of […]
=> Les produits L2 issus de la chaine Maja font régulièrement l’objet d’une évaluation de leur qualité, que ce soit de la détection des nuages, de l’estimation des épaisseurs optiques ou de l’estimation de la réflectance de surface. Si la validation des masques de nuages repose essentiellement sur la fastidieuse création de jeux de contrôles […]
Yes, so far MUSCATE is winning against COVID ! MUSCATE is THEIA land data production center in CNES. Although everyone in the production and development team is working from home, in good health so far, the production is still on, as you may see on the counters. We even passed the 10 000 products milestone […]