Study of Physical Phenomena of Vegetation Using Polarimetric Scattering indices and Entropy

Autor:	S Panigrahy, K A Reddy, S. Maity, J S Parihar, C. Patnaik
Rok vydání:	2011
Předmět:	Synthetic aperture radar Physics Atmospheric Science Amplitude Scattering Physical phenomena Polarimetry Entropy (information theory) Computers in Earth Sciences Eigendecomposition of a matrix Eigenvalues and eigenvectors Remote sensing
Zdroj:	IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing. 4:432-438
ISSN:	2151-1535 1939-1404
DOI:	10.1109/jstars.2010.2076272
Popis:	A polarimetric model has been developed to study the temporal growth of different vegetation canopies, and their architecture. Eigen decomposition and coherency matrices are analyzed for completely polarimetric Radarsat-2 data. Polarimetric indices have been formulated using co and cross polarized backscattering coefficients, eigen values and eigen vectors. The polarization indices are used to completely understand the difference between polarized scattering signatures of vegetation in HH and VV polarizations. In this study, two decomposition techniques have been used like Freeman-Durden and H/A/α and their volume scattering and entropy components in conjunction with co and cross polarized indices are analyzed. This qualitative evaluation of vegetation parameters and growth stage are found to work better with polarimetric complex SAR data rather than using amplitude imagery.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e17803faf9987cee2ffe158628e6359e https://doi.org/10.1109/jstars.2010.2076272 Zobrazit plný text záznamu