An improved model for the dielectric constant of sea water at microwave frequencies

作者：Lior Klein, C.T. Swift · 发表于：IEEE Transactions on Antennas and Propagation · 年份：1977 · DOI：10.1109/tap.1977.1141539 · 被引用次数：904 · 研究领域：Microwave and Dielectric Measurement Techniques、Soil Moisture and Remote Sensing、Advanced Fiber Optic Sensors

The advent of precision microwave radiometry has placed a stringent requirement on the accuracy with which the dielectric constant of sea water must be known. To this end, measurements of the dielectric constant have been conducted atS-band andL-band with a quoted uncertainty of tenths of a percent. These and earlier results are critically examined, and expressions are developed which will yield computations of brightness temperature having an error of no more than 0.3 K for an undisturbed sea at frequencies lower thanX-band. At the higher microwave and millimeter wave frequencies, the accuracy is in question because of uncertainties in the relaxation time and the dielectric constant at infinite frequency.