Statistical Analysis of VHF-Band Tree Backscattering Using Forest Ground Truth Data and PO Scattering Model
Artikel i vetenskaplig tidskrift, 2011

This paper analyzes the statistical properties of the very high frequency (VHF)-band radar backscattering from coniferous trees by incorporating forest ground truth data into a physical-optics (PO) model that assumes horizontally transmit and receive polarizations and dominant double-bounce scattering from vertical stems standing on an undulating ground surface. The analysis shows that a statistically adequate model for the tree backscattering amplitude can be presented as a mixture of generalized gamma or lognormal distribution, and the mixture model can be reduced to a single density model if the trees with trunk volumes exceeding an appropriate threshold are to be taken into account. The generalized gamma density is shown to provide an appreciably better fit to the exceedance functions associated with the PO model data than that for the lognormal density. The results can be used to design statistically adequate models of forest clutter for VHF synthetic aperture radar systems.

coniferous forest

lognormal distribution

radar cross section (RCS)

very high frequency (VHF)

finite mixture model

physical-optics (PO)

generalized gamma distribution

Backscattering

synthetic aperture radar (SAR)

Författare

Anatoliy Kononov

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

Annelie Wyholt

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

Gustaf Sandberg

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

Lars Ulander

Chalmers, Rymd- och geovetenskap, Radarfjärranalys

IEEE Transactions on Geoscience and Remote Sensing

0196-2892 (ISSN)

Vol. 49 8 3035-3046 5743001

Drivkrafter

Hållbar utveckling

Ämneskategorier

Beräkningsmatematik

Jordbruksvetenskap

Sannolikhetsteori och statistik

DOI

10.1109/TGRS.2011.2116158