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An improved model for the dielectric constant of sea water at microwave frequenciesThe 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 at S-band and L-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 than X-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.
Document ID
Document Type
Reprint (Version printed in journal)
Klein, L. A. (George Washington University Hampton, Va., United States)
Swift, C. T. (NASA Langley Research Center Hampton, Va., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1977
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: AP-25
Subject Category
Distribution Limits