Modelled Polarimetric Backscattering Response from Single Pine Trees and Pine Canopies

Details Modelled Polarimetric Backscattering Response from Single Pine Trees and Pine Canopies Modelled Polarimetric Backscattering Response from Single Pine Trees and Pine Canopies

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.529e..52p&link_type=abstract

Proceedings of the Workshop on POLinSAR - Applications of SAR Polarimetry and Polarimetric Interferometry (ESA SP-529). 14-16 Ja

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In this work a coherent backscattering model has been employed to simulate L-band polarimetric backscattering from a single pine tree and a small pine forest stand. The recently developed 'Electromagnetic Scattering Model for Forest Remote Sensing' has been employed in calculations. The backscattering model uses the discrete particle approach and it can handle first order direct scattering, single and double ground bounce terms, and first order interaction between the trunk and branches. The model computes fully coherent polarimetric quantities for any construction made of cylinders. Tree cylinder models for simulations are created with the LIGNUM tree growth model. The polarimetric covariance matrix for the tree has been calculated as an average over tree azimuth angles. The target entropy and alpha angle are examined as a function of tree stem volume. EMISAR images from 1995 from Finland are used in comparison . Results indicate that the model can predict correctly behaviour of direct backscattering, but the ground bounce terms suffer from simplifications made as ground is modelled as a perfectly smooth surface. However, the model is able to predict correctly scattering mechanism change as a function of stem volume.

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