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Global monitoring of sea surface salinity from space requires an accurate model for the dielectric constant of sea water as a function of salinity and temperature to characterize the emissivity of the surface. Measurements are being made at 1.413 GHz, the center frequency of the Aquarius radiometers, using a resonant cavity and the perturbation method. The cavity is operated in a transmission mode...
Measurements of the complex dielectric constant of seawater at 30.00 psu, 35.00 psu and 38.27 psu over the temperature range from 5degC to 35degC at 1.413 GHz are given and compared with the Klein-Swift results. A resonant cavity technique is used. The calibration constant used in the cavity perturbation formulas is determined experimentally using methanol and ethanediol (ethylene gycol) as reference...
A temperature controlled resonant cavity is used to measure the complex dielectric constant of seawater at 30 psu over the temperature range from 10degC to 35degC at 1.413 GHz. The measurements are conducted multiple times to obtain the mean and the standard deviation at each point. This paper describes the experimental procedure and presents recent dielectric constant results. These results are compared...
A new temperature controlled microwave cavity system to measure the complex dielectric constant of seawater at 1.413 GHz is discussed. The system is being developed to measure seawater for temperatures from 0degC to 30degC and salinities from 10 to 40 psu. The paper discusses the construction of the measurement system and initial stability tests.
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