NDLI: Automated instrumentation for continuous monitoring of the dielectric properties of woody vegetation: system design, implementation, and selected in situ measurements

Content Provider	IEEE Xplore Digital Library
Author	McDonald, K.C. Zimmermann, R. Way, J. Chun, W.
Copyright Year	1980
Abstract	The design and implementation of a system for the automated and continuous in situ monitoring of the dielectric constant of woody vegetation tissue are presented. The implementation of both single-channel and multichannel systems is discussed. These systems permit unsupervised continuous and long-term monitoring of vegetation canopy dielectric behavior in remote field sites. Utilizing open-ended coaxial lines, the real and imaginary parts of the microwave dielectric constant of woody plant tissue are inferred from direct measurement of the magnitude and phase of the microwave reflection coefficient. Samples of in situ data from forests in contrasting ecological environments are presented. Measurements obtained with the authors' systems allow new insight into the dielectric behavior of vegetation with respect to the physiological and hydraulic function of trees. The observations provide a significant advance in our ability to link canopy physiological and hydraulic behavior to radar remote-sensing observations.
Sponsorship	IEEE Geoscience and Remote Sensing Society IEEE URSI
Starting Page	1880
Ending Page	1894
Page Count	15
File Size	919528
File Format	PDF
ISSN	01962892
Volume Number	37
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Instruments Computerized monitoring Vegetation mapping Remote monitoring Dielectric constant Dielectric measurements Biomedical monitoring Coaxial components Microwave measurements Phase measurement
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Electrical and Electronic Engineering

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