RADIOMETRIC MEASUREMENT OF CORN CANOPY WATER CONTENT WITH A 916 MHz WIRELESS SENSOR NETWORK

João Carlos Giacomin, Flávio Henrique Vasconcelos, Elson José da Silva

Abstract

A wireless sensor network is used as a distributed system for measuring plant water content in crop fields. The WSN works as a radiometric sensor which gets the information about vegetation water content from the RF communication signals. No specific sensor is needed. The equations of the measurement process are developed based on the two ray propagation model. Experimental results obtained in a corn field demonstrate a linear relation between gravimetric moisture of plants and the attenuation of the WSN RF signals.

Keywords

vegetation water content, radio signal attenuation, wireless sensor network

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IMEKO-WC-2009-TC19-646.pdf

DOI

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IMEKO TC

TC19 - Environmental Measurements

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