aalto1 untyped-item.component.html
Attenuation of radar signal by a boreal forest canopy in winter
Loading...
Access rights
openAccess
publishedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Unless otherwise stated, all rights belong to the author. You may download, display and print this publication for Your own personal use. Commercial use is prohibited.
Date
Major/Subject
Mcode
Degree programme
Language
en
Pages
5
Series
IEEE Geoscience and Remote Sensing Letters, Volume 19
Abstract
An investigation of boreal forest attenuation of a radar signal in winter is presented, applying a multifrequency (1-10 GHz) ground-based synthetic aperture radar (GB-SAR). As stable targets, corner reflectors (CRs) with known radar cross section (RCS) were used under the forest canopy. This enabled to relate changes in observed wideband backscattering from the reflectors to attenuation of the radar signal in forest vegetation, eliminating the influence of the background, such as snow and soil. We found that ambient temperature affected the observed attenuation of the radar signal in the entire 1-10-GHz frequency range. For temperatures T < 0 °C, attenuation was found to decrease by up to 4.3 dB at the lowest observed temperatures of-36 °C, with peak attenuation occurring at T ≈ 0 °C. The overall apparent two-way attenuation increased by up to 18 dB from L-to X-band. The presence of snow on the canopy was found to increase attenuation by 1-4 dB, the effect increasing with frequency while having only negligible effects on vegetation backscatter.
Description
Publisher Copyright: Author
Keywords
Other note
Citation
Lemmetyinen, J, Ruiz, J J, Cohen, J, Haapamaa, J, Kontu, A, Pulliainen, J & Praks, J 2022, 'Attenuation of radar signal by a boreal forest canopy in winter', IEEE Geoscience and Remote Sensing Letters, vol. 19, 2505905. https://doi.org/10.1109/LGRS.2022.3187295