Measure of Temporal Variation of P-Band Radar Cross Section and Temporal Coherence of a Temperate Tree
| Autor: | Eric Pottier, Nicolas Floury, Clement Albinet, Pierre Borderies |
|---|---|
| Přispěvatelé: | ONERA - The French Aerospace Lab [Toulouse], ONERA, European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Institut d'Électronique et des Technologies du numéRique (IETR), Université de Nantes (UN)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Office National d'Etudes et de Recherches Aerospatiales through the internal Federating Research Project ENVIRO, European Space Agency, Nantes Université (NU)-Université de Rennes 1 (UR1), Agence Spatiale Européenne = European Space Agency (ESA), Université de Nantes (UN)-Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2016 |
| Předmět: |
Radar cross-section
0211 other engineering and technologies 02 engineering and technology Atmospheric sciences REMOTE SENSING law.invention law Temperate climate Electrical and Electronic Engineering Radar Time series SCATTEROMETER 021101 geological & geomatics engineering Remote sensing Temperate forest Scatterometer TEMPORAL COHERENCE RADAR Trunk RADAR CROSS SECTION [SPI.ELEC]Engineering Sciences [physics]/Electromagnetism TEMPERATE FOREST 13. Climate action General Earth and Planetary Sciences Environmental science Coherence (physics) |
| Zdroj: | IEEE Transactions on Geoscience and Remote Sensing IEEE Transactions on Geoscience and Remote Sensing, Institute of Electrical and Electronics Engineers, 2016, 54 (11), p. 6255-6264. ⟨10.1109/TGRS.2016.2565384⟩ IEEE Transactions on Geoscience and Remote Sensing, 2016, 54 (11), p. 6255-6264. ⟨10.1109/TGRS.2016.2565384⟩ |
| ISSN: | 1558-0644 0196-2892 |
| DOI: | 10.1109/tgrs.2016.2565384 |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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