MEASUREMENTS OF ELECTRIC FIELDS BETWEEN 3 CPS AND 10,000 CPS WITH A VERTICAL ANTENNA OVER THE ATLANTIC OCEAN NEAR THE EAST COAST OF FLORIDA.

During a cruise from Norfolk, Virginia to Key West, Florida on the USNS GILLISS measurements of electric fields between 3 cps and 10 kc were performed on two successive days. The mean signal level on the second day was 20 db higher than on the first day. The amplitude versus frequency curves obtained for the two days were also different. A possible cause for these differences was the formation of the hurricane Hilda in the Gulf of Mexico during the period of measurements (September 30, October 1, 1964). Various types of natural and man-made interference were analyzed and proposals for improvements in the measurement system are made. (Author)