Entry: Frequency domain reflectometry
stable
URI: http://codes.wmo.int/wmdr/ObservingMethodTerrestrial/346
Measurement of soil capacitance by means of radio frequency waves. The soil acts as the dielectric completing a capacitance circuit, which is part of a feedback loop of a high-frequency transistor oscillator. [Based on 'Frequency domain reflectometry' in Guide to Hydrological Practices (WMO-No. 168), Volume I. 2008 edition, updated in 2020.]
Definition
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Measurement of soil capacitance by means of radio frequency waves. The soil acts as the dielectric completing a capacitance circuit, which is part of a feedback loop of a high-frequency transistor oscillator. [Based on 'Frequency domain reflectometry' in Guide to Hydrological Practices (WMO-No. 168), Volume I. 2008 edition, updated in 2020.]
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Frequency domain reflectometry
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346
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Concept
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