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Author: | Holmberg, Jan Peter |
Title: | Prediction of Forest Backscatter by Applying a Single Tree Scattering Model |
Uppskattning av Bakåtspridning från Skogsterräng Genom Applicering av en Spridningsmodell för ett Enskilt Träd | |
Publication type: | Master's thesis |
Publication year: | 2005 |
Pages: | viii + 76 s. + liitt. 5 Language: eng |
Department/School: | Sähkö- ja tietoliikennetekniikan osasto |
Main subject: | Avaruustekniikka (S-92) |
Supervisor: | Pulliainen, Jouni |
Instructor: | Praks, Jaan |
OEVS: | Electronic archive copy is available via Aalto Thesis Database.
Instructions Reading digital theses in the closed network of the Aalto University Harald Herlin Learning CentreIn the closed network of Learning Centre you can read digital and digitized theses not available in the open network. The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/ You can read theses on the Learning Centre customer computers, which are available on all floors.
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Location: | P1 Ark S80 | Archive |
Keywords: | remote sensing polarimetric forest backscatter ground roughness ICA LIGNUM IEM SAR fjärranalys polarimetrisk skog bakåtspridning ojämn mark |
Abstract (eng): | In this thesis a study and further development of a single tree scattering model, used to predict forest backscatter, has been carried out. The existing scattering model is presented, together with the simulations where it has been used. The single tree scattering model is fully polarimetric and coherent. It uses the infinite cylinder approximation (ICA) to calculate the scattered field from a collection of dielectric cylinders, together forming a tree. The cylinder tree has been generated by the LIGNUM tree growth model. The results of the improved scattering model, to which ground roughness has been added, are presented and compared with, the results of the previous model, as well as with SAR (synthetic aperture radar) measurements. The improved model uses an integral equation model (IEM) to model scattering from the ground. The results of the improved model are in good agreement with SAR measurements. The single tree scattering model has also been used to predict the forest canopy extinction, by applying the forward scattering theorem. The results of the extinction estimates have been compared with a semi-empirical model. |
ED: | 2005-04-13 |
INSSI record number: 28271
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