Journal article

On the ability of AirSAR to measure patterns of dielectric constant at the hillslope scale

AW Western, RB Grayson, T Sadek, H Turral

Journal of Hydrology | ELSEVIER SCIENCE BV | Published : 2004


This paper assesses the potential for measuring spatial patterns of dielectric constant using AirSAR images at high spatial resolutions (up to 10 m pixel sizes). Dielectric constant is strongly related to soil moisture. Data from the 10ha Tarrawarra experimental catchment in south-eastern Australia are used. Ground data collected include detailed spatial patterns of dielectric constant measured with time domain reflectometry on a 10 m grid over the 10ha catchment (∼1000 measurements), as well as surface roughness and vegetation characteristics. The average dielectric constant was 16.9, soil moisture was 29.6% volumetric, rms surface roughness height was 1.7 cm and average pasture biomass was..

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