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A method to estimate tree trunk diameter and its application to discriminate Java-Indonesia tropical forests

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A numerical method was used to analyse the interaction of L-band microwaves with the trunks of four species of Java-Indonesian trees. These species were teak (Tectona grandis), pine (Pinus merkusii), mahogany (Swietenia macrophylla) and rasamala (Altingia exelsa). This method approximated a tree trunk as an infinite length of three layers of cylindrical dielectric media. The horizontal polarisation of the scattered wave was derived in order to calculate the relationship between tree trunk diameter and backscattering coefficient. The analysis result was confirmed by simulating the scattering problems on trunk using the Finite Difference Time Domain (FDTD) method. Both analysis and simulation results were similar. This relationship was used to estimate trunk diameters from JERS-1 SAR data.

Document Type: Research Article


Affiliations: Centre for Environmental Remote Sensing, Chiba University, 1-33, Yayoi, Inage, Chiba 263-8522, Japan

Publication date: January 10, 2001

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