Accession Number : AD0283318

Title :   EXPERIMENTAL INVESTIGATION OF CHAFF TRANSMISSION IN THE 1300 TO 1800 MC FREQUENCY RANGE. VOLUME I

Corporate Author : RADIATION INC MELBOURNE FLA

Personal Author(s) : BAUER,LOUIS H.

Report Date : 30 JUN 1962

Pagination or Media Count : 1

Abstract : The purpose of the program was to determine the feasibility of communcating from a point on the earth to another below the horizon using forward scatter from a chaff cloud. The frequency range of interest was 1300 to 1800 mc; tests were performed at 1500 and 1750 mc using AN/GRC-50 radio relay equipment. The experimental program was divided into two phases. In Phase I, chaff was dispersed at an altitude of 10,000 feet from an aircraft and the ground test sites were separated by 4.4 miles. In Phase II, tests were performed with a site separation of 52 miles and the chaff was dispersed at approximately 13,000 feet. Information was obtained on chaff fall rate, chaff cloud drift rate and cloud configuration from radar data. An AN/GRC-50 military radio relay system provided data on the behavior of bistatic scattering cross-section of the chaff cloud. Measurements were made of the magnitude of bisatic cross-section, probablity distribution of power of the received signal, power spectral density of the received signal, polarization sensitivity of the cloud and the relationship between bistatic cross-section and the number of dipoles. Simple experiments were performed to measure the information bandwidth of the chaff cloud. It was determined that chaff communicaion beyond the horizon is feasible using reasonable quantities of chaff dipoles. (Author)

Descriptors :   *COMMUNICATION AND RADIO SYSTEMS, POLARIZATION, RADIO RELAY SYSTEMS, RADIO TRANSMISSION, SCATTERING, TEST EQUIPMENT, TEST METHODS

Distribution Statement : APPROVED FOR PUBLIC RELEASE