Des flux d'eau aux flux de matières en suspension et de contaminants associés : gestion d'un réseau de stations hydro-sé...
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International audience
Analysis of Sentinel-1 Radiometric Stability and Quality for Land Surface Applications
Land monitoring using temporal series of Synthetic Aperture Radar (SAR) images requires radiometrically well calibrated sensors. In this paper, the radiometric stability of the new SAR Sentinel-1A “S-1A” sensor was first assessed by analyzing temporal variations of the backscattering coefficient (σ°) returned from invariant targets. Second, the rad...
Spatial variability of phenology in two irrigated grapevine cultivar growing under semi-arid conditions
Published in Precision Agriculture
Knowledge and monitoring of the grapevine phenology during the season are important requirements for characterization of productive regions, climate change studies and planning of various production activities at the vine field scale. This work aims at studying the spatial variability of grapevine phenology at the within field scale. It was conduct...
Conservation du dugong en Nouvelle-Calédonie : une étude à plusieurs échelles spatio-temporelles. Synthèse finale
Comprendre l’écologie d’une espèce et les processus qui la menacent peut aider à identifier des sites de conservation afin d’améliorer les mesures de gestion. Ces informations sont souvent incomplètes ou tout simplement indisponibles à une échelle permettant des prises de décisions et la mise en place d’actions de conservation et de gestion efficac...
Satellite remote sensing to monitor species diversity: potential and pitfalls
Assessing the level of diversity in plant communities from field-based data is difficult for a number of practical reasons: (1) establishing the number of sampling units to be investigated can be difficult; (2) the choice of sample design can impact on results; and (3) defining the population of concern can be challenging. Satellite remote sensing ...
Potential of proximal hyperspectral imaging to estimate the spatial and temporal variability of soil microbial respirati...
International audience
Variabilité spatio-temporelle des précipitations aux échelles de l'hydrologie urbaine
Determination of the main sources and influence factors of submicronic particle pollution. Study of a French urban site
Spatial scale and degree of synchrony in brown trout (salmo trutta) population dynamics
Spatio-temporal variability of the physical conditions in streams is known to influence freshwater population dynamics. However, the complex relationship between these physical factors (mainly available habitat, water temperature, discharge, sediment transport) and the biological response is not yet clearly understood in either natural or regulated...
Relative Radiometric Normalization and Atmospheric Correction of a SPOT 5 Time Series
Multi-temporal images acquired at high spatial and temporal resolution are an important tool for detecting change and analyzing trends, especially in agricultural applications. However, to insure a reliable use of this kind of data, a rigorous radiometric normalization step is required. Normalization can be addressed by performing an atmospheric co...
