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Within the framework of preparatory studies for future Earth Observation (EO) missions such as ARCTOS, the CNES requires a technical vision of spectral band usefulness, and in particular the benefits of including Short Wave Infrared channels (SWIR) in future Very High Resolution (VHR) optical sensors. Involved in the definition of such systems and in the thematic testing of simulated future and recent...
The Flood Dragon project enhances the Envisat contribution for natural disaster monitoring such as flooding. During the 2005 and 2006 Chinese flood seasons, over the 23 attempted NRT exploitations of Envisat, 19 were successful, allowing exploitation of emergency programming procedures as well as Rolling Archive capabilities (based on ordinary long term acquisition scheduling). Obtained results are...
Poyang Lake, one of the most regularly flooded areas in China, can be considered as a key natural flood control and reduction element within the Changjiang middle basin. Within the Flood DRAGON Project, part of the MOST-ESA DRAGON Programme, Poyang Lake's water extent was monitored based on 64 ENVISAT low and medium resolution ASAR and MERIS Full Resolution data, over a two and half year period. It's...
Since more than 15 years, ESA SAR data are worldly exploited for flood management and monitoring. The aim of this paper is to present improvement of ENVISAT sensors as well as limitations. Some milestones from Charter and Flood DRAGON actions are highlighted. Emphasis is given to the exploitation of medium resolution data, MERIS and ASAR WSM, which insure thematic accuracy, maximise coverage and revisit...
Located in Jiangxi Province, Poyang Lake is the largest freshwater lake in China and constitutes a major hydrological subsystem of the middle Yangtze river (Changjiang) basin in central China. An impressive amount of low to medium resolution ENVISAT data covering the Poyang Lake's 2004 and 2005 hydrologic years were acquired and analysed within the framework of the flood DRAGON project. Land cover...
Semi-automatic flood extraction procedures based on change detection techniques appear particularly adapted to plain flood monitoring and mapping. The change detector was specifically elaborated to analyse ENVISAT ASAR wide swath mode data pairs, which appear very well adapted to flood monitoring over wide areas. The algorithm is based on two analysis levels: an enhanced ratio for strong changes over...
The investigation carried out at wetlands in Biebrza Basin, the biggest area of the marshes and swamps in Central Europe, aimed at finding the best biophysical properties of wetlands vegetation to characterise marshland habitats. The various soil-vegetation indices on the basis of all considered spectral bands of satellites as Landsat +ETM, SPOT, ERS-2, NOAA, ENVISAT have been calculated. The GEMI...
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