Title :
Examination of forest polarimetric backscattering with coherent cylinder model
Author :
Praks, Jaan ; Pulliainen, Jouni ; Ahtonen, Pekka ; Hallikainen, Martti
Author_Institution :
Lab. of Space Technol., Helsinki Univ., Finland
Abstract :
In this work a coherent backscattering model for cylinders has been employed to simulate L-band and C-band polarimetric backscattering form a pine forest. Scattering covariance matrix, entropy, alpha angle, polarimetric coherence and temporal coherence are calculated and compared with SAR measurements. The results show that direct backscattering from tree crowns is an important scattering mechanism. Realistic ground reflection modelling was shown to be very important. By simulating the tree growth, general agreement between the known biomass and backscattering parameters was achieved.
Keywords :
backscatter; forestry; radar polarimetry; remote sensing by radar; synthetic aperture radar; vegetation mapping; C-band; L-band; SAR images; SAR measurements; alpha angle; backscattering parameters; biomass; coherent backscattering model; coherent cylinder model; direct backscattering; entropy; ground reflection modelling; pine forest canopy; polarimetric backscattering; polarimetric coherence; polarimetric parameters; scattering covariance matrix; scattering mechanism; temporal coherence; tree crowns; tree growth simulation; Backscatter; Coherence; Electromagnetic measurements; Electromagnetic scattering; Entropy; L-band; Particle scattering; Remote sensing; Snow; Space technology;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2003. IGARSS '03. Proceedings. 2003 IEEE International
Print_ISBN :
0-7803-7929-2
DOI :
10.1109/IGARSS.2003.1293965