=> You all know how I am a strong supporter of Sentinel-2 mission; and an admirer of how the project was conceived, conducted, with a minimal delay, excellent performances and a ground segment which started producing data very quickly after the end of commissioning phase. However, each time I have a look at ESA’s communication around […]
=> In the framework of the THEIA land data center, we have developed a simple but robust method to map the snow cover from Sentinel-2-like level 2A products. This code was tested with SPOT-4 Take-5 and Landsat-8 series, but it remained to adapt it so that it can run on real Sentinel-2 images! This is […]
=> In a lecture given at University Paul Sabatier on December 10, 2015 « Should we be afraid of climate change? », Franck Roux told this sentence (I quote from memory): « The human being is a very good weather sensor, but it is a poor climate sensor. » Since our memory can play tricks on us, satellite images […]
=> A new version o Sen2cor has been published recently, and this comparison was re-iterated with Sen2cor 2.2.1. The corresponding post is published here. While CNES is getting ready to produce and distribute Sentinel-2A products obtained with our MACCS processor, I have been asked by impatient users what I thought of SEN2COR Sentinel-2 cloud masks. […]
=> peps_download This is a simple piece of code to automatically download the products provided by the French Sentinel collaborative ground segment named PEPS : https://peps.cnes.fr. PEPS is mirroring all the Sentinel data provided by ESA, and is providing a simplified access.This code was written thanks to the precious help of one my colleagues at CNES Jérôme […]
=> The first thing we do in the morning at CESBIO is a break : the coffee break. This is the perfect time to gather field information on the state of the snow cover in the Pyrenees. This year everyone agrees that snow is rare … Can we check this using remote sensing?
=>Since THEIA new Single Sign On authentication went on-line, last summer, it was not possible anymore to use a program to automatically download the products from the Take5 and Theia servers. But after insisting a little bit ( I have good insistance skills ), and with the arrival of a new version, Jerôme Gasperi invented […]
=> Evapotranspiration is a key factor to estimate the water quantities involved in the water cycle. For instance, one extimates that 60% of rain water is evapo-transpirated, and wheat plant releases 500mm of water through evapotraspiration. It is therefore useful to monitor this variable along the agricultural seasons, to estimate the crop water needs and […]
=>Dear readers, may this new year bring you health and happiness ! On a general point of view, at least in France, it is not with many regrets that we see the end of 2015, and 2016 is much welcome ! But, as far as earth observation time series are concerned, 2015 was for […]