We have just updated the MAJA/THEIA workshop website to add a draft program. The workshop will be held in Toulouse, from 13th to 14th of June, and will be hosted by the ENSEEIHT engineering school in Toulouse historical center. Registrations are still open, until the third of June. The aim of this workshop is to collect […]
The Global Imagery Browse Services is an API provided by the NASA to access its vast collection of Earth Observation products. It’s convenient to use the Worldview online data browser to get the right URL template. Just click on « Take a snapshot » and copy the URL. For example the following URL allows you to download […]
=> Sentinel-2B has two channels centered on water vapour absorption bands: channel 9 (940 nm) and channel 10 (1380 nm). Band 10 corresponds to a very strong absorption, strong enough to prevent any photon to reach ground from the Sun without being absorbed in the atmosphere. This band is intensively used to detect and correct […]
I discussed some important aspects to take into account when validating land cover maps in a previous post. In that same post I insisted on the fact that machine learning pipeline building using a blind optimisation of accuracy metrics can lead to unrealistic expectations about land cover maps produced using these approaches. I cited as an […]
We will start distributing MAJA V3.1 this May to replace MAJA V1 on CNES free software platform. It is also in the pipeline of enhancements of Theia processing platform (MUSCATE), but this pipeline is quite full, so we will need to be patient (which requires a big effort for me, patience not being my best quality…) MAJA […]
A good piece of news, directly from ESA’s S2 project manager: ESA is now making plans for a global reprocessing of Sentinel-2 archive in 2019. As explained here, Sentinel-2 data multi-temporal registration isn’t perfect yet. It should be improved in the first quarter of 2019, thanks to the use of ground control points obtained via […]
=> MUSCATE sentinel-2 L2A counter just reached 80000 products, but a lot more products were processed these past weeks. Indeed, the MUSCATE team started processing the early Sentinel-2B images acquired from July to October 2017, which were missing on our catalog. Indeed. We only started Level 2A treatments in October 2017, in real time (a […]
Great news for our little Venµs satellite project: Theia has started distributing Venµs L1C data in near real time. The data acquired yesterday are already available on https://theia.cnes.fr These L1C products are tagged with 0.9 version, which means that their quality is not as good as what we think we will be able to deliver in […]
Update from May 4th 2018 : ESA has started planning for a global reprocessing in 2019 The information gathered by Sentinel-2 system on Sentinel-2 orbit, attitude, date accuracy, and viewing directions of all detectors allows an excellent accuracy for the geolocation of all Sentinel-2 pixels. The overall geo-location accuracy is better than 11 or 12 […]