Accession Number : AD0880990

Title :   Azimuthal Distribution and Characteristic Properties of Ambient Noise at H.F.

Descriptive Note : Technical rept. no. 23,

Corporate Author : ILLINOIS UNIV AT URBANA RADIO RESEARCH LAB

Personal Author(s) : Weeks, Andrew S. ; Bailey, Albert D.

Report Date : DEC 1970

Pagination or Media Count : 48

Abstract : An experimental method was devised and is presented for determining the azimuthal distribution and characteristic properties of ambient noise in the high frequency band. A discussion of possible sources of the noise is given. Assumptions made and reasons for conducting the experiment using the method described are stated, as are assumptions made in the analysis procedure followed. Detailed discussion of experimental procedure is given and early results from data collected are presented. (Author)

Descriptors :   (*ATMOSPHERICS, HIGH FREQUENCY), (*RADIO INTERFERENCE, ATMOSPHERICS), ELECTROMAGNETIC RADIATION, BACKGROUND, PROPAGATION, AZIMUTH, DIRECTION FINDING, RADIO EQUIPMENT, MEASURING INSTRUMENTS, INFORMATION THEORY, TRANSMITTER RECEIVERS, COMMUNICATION AND RADIO SYSTEMS, ANTENNAS, RADIO COMPASSES.

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE