Identification of major backscattering sources in trees and shrubs at 10 GHz

R. Zoughi*, Lin-Kun Wu, R. K. Moore

*Corresponding author for this work

研究成果: Article同行評審

30 引文 斯高帕斯(Scopus)

摘要

A short-range very-fine-resolution FM-CW radar scatterometer has been used to identify the primary contributors to 10-GHz radar backscatter from pine, pin oak, American sycamore and sugar maple trees, and from creeping juniper shrubs. This system provided a range resolution of 11 cm and gave a 16-cm diameter illumination area at the target range of about 4 m. For a pine tree, the needles caused the strongest backscatter as well as the strongest attenuation in the radar signal. Cones, although insignificant contributors to the total backscatter, were more important for backscattering than for attenuation. For the rest of the trees, leaves were the strongest cause of backscattering and attenuation. However, in the absence of leaves, the petioles, small twigs, and branches gave relatively strong backscatter. For American sycamore and sugar maple trees, the fruits did not affect the total backscatter unless they were packed in clusters. For creeping juniper the backscattered energy and attenuation in the radar signal were mainly due to the top two layers of the evergreen scales. The contribution of the tree trunks was not determined.

原文English
頁(從 - 到)269-290
頁數22
期刊Remote Sensing of Environment
19
發行號3
DOIs
出版狀態Published - 1 一月 1986

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