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CALCULATIONS FOR THE CALIBRATION OF NAVY RIFI METERS USING A VERTICAL ROD ANTENNA,
NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF
From curves of vertical electric fields and dis turbance errors versus distance, it is shown how calibration factors for an RIFI meter can be obtained by taking measurements at the surface of a conducting body of briny water such as the Great Salt Lake, Utah. Curves are presented which show that, for the four frequencies, 10 kcsec, 100 kcsec, 1 mcsec, and 10 mcsec, the vertical electric field produced by a vertical 1-meter antenna is, at any given distance up to 200 meters, the same for all values of conductiv ity, greater than or equal to 5 mhosmeter. Thus, a brine solution with a conductivity in this range is equivalent to a perfectly conducting earth. At a frequency of 75 mcsec the field values are the same at distances up to about 100 meters for all values of conductivity equal to or greater than 5 mhosmeter. Curves are also given which show the dependence of the dis turbance error on distance, as produced by a receiving vertical 1-meter antenna. Author AD-417 549