Exploring attenuation coefficients of forest vegetation with broadband backscattering measurement system

The introduction of the full paper reviews a number of papers in the open literature and then proposes using the indoor broadband backscattering measurement system to obtain the accurate and multi-polarized 3-10 GHz frequency-domain data of a small-scenario forest. Sections 1, 2 and 3 explain our exploration. Their core consists of: (1) we establish the model of attenuation coefficient of forest vegetation and quantitatively derive the mathematical relations between the polarized attenuation coefficients of the forest vegetation and those of its echo by using time-domain analysis; (2) we establish a broadband backscattering measurement system to analyze the variation of polarized attenuation characteristics with frequency by means of the morphological characteristics of forest vegetation. The experimental results, given in Figs 3 and 4, and their analysis show preliminarily that: (1) the various polarized attenuation coefficients can describe the morphological characteristics of forest vegetation; (2) when the frequency of the broadband backscattering measurement system is low, the structural distribution of forest vegetation has its original orientation; as the frequency increases, the echo of forest vegetation mainly comes from canopy and its structure has random distribution.