DocumentCode
1049492
Title
An improved model for the dielectric constant of sea water at microwave frequencies
Author
Klein, Lawrence A. ; Swift, Calvin T.
Author_Institution
George Washington Univ. as a Research Associate at NASA Langley Research Center, Hampton, VA, USA
Volume
2
Issue
1
fYear
1977
fDate
1/1/1977 12:00:00 AM
Firstpage
104
Lastpage
111
Abstract
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 at 
-band and 
-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 
-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.
-band and -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 -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.Keywords
Dielectric measurements; Microwave radiometry; Sea measurements; Antenna measurements; Brightness temperature; Dielectric constant; Dielectric measurements; Extraterrestrial measurements; Integral equations; Microwave frequencies; Microwave radiometry; Ocean temperature; Sea measurements;
fLanguage
English
Journal_Title
Oceanic Engineering, IEEE Journal of
Publisher
ieee
ISSN
0364-9059
Type
jour
DOI
10.1109/JOE.1977.1145319
Filename
1145319
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