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Measure of temporal variation of P-Band radar cross section and temporal coherence of a temperate tree / Clément Albinet in IEEE Transactions on geoscience and remote sensing, vol 54 n° 11 (November 2016)  

Public [article]  inIEEE Transactions on geoscience and remote sensing > vol 54 n° 11 (November 2016) . - pp 6255 - 6264 Titre : Measure of temporal variation of P-Band radar cross section and temporal coherence of a temperate tree Type de document : Article/Communication Auteurs : Clément Albinet, Auteur ; Pierre Borderies, Auteur ; Nicolas Floury, Auteur ; Eric Pottier, Auteur Année de publication : 2016 Article en page(s) : pp 6255 - 6264 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] bande P [Termes IGN] Cedrus (genre) [Termes IGN] constante diélectrique [Termes IGN] diffusomètre [Termes IGN] polarimétrie radar [Termes IGN] surface équivalente radar Résumé : (Auteur) This paper deals with a ground experiment based on a P-band scatterometer that measured the evolution of the radar cross section (RCS) and coherence of a temperate tree in HV polarization, during four periods spread over nine months, over a cedar tree. Watering of the tree has limited influence in time on the RCS, i.e., limited to around 30 min, but impacts the coherence over a longer period of time. Analysis of the series shows that according to the season considered, clear daily cycles from 1 to 2 dB may appear on the coherence only (autumn) or on both coherence and RCS (spring), whereas in winter, they are absent on both results. It was analyzed in the literature that the variations in RCS are strongly correlated to the variations in the dielectric constant in trunks and branches. In addition, it was shown that the HV RCS presents seasonal trends with a yearly cycle of roughly 3 dB following similar trends reported for trunk moisture content time series. Numéro de notice : A2016-910 Affiliation des auteurs : non IGN Thématique : FORET/IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1109/TGRS.2016.2565384 En ligne : http://dx.doi.org/10.1109/TGRS.2016.2565384 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=83132 [article]