Accession Number : AD0611340

Title :   MAN-MADE ELECTROMAGNETIC INTERFERENCE AT EXTREMELY LOW FREQUENCIES,

Corporate Author : PACIFIC NAVAL LAB ESQUIMALT (BRITISH COLUMBIA)

Personal Author(s) : Lokken,J. E. ; Shand,J. A.

Report Date : 27 MAY 1964

Pagination or Media Count : 8

Abstract : In the electromagnetic spectrum between 6 and 36 c.p.s. several classes of manmade noise have been observed in rural areas adjacent to cities. Their probable sources are suggested. In many Canadian semirural areas this interference, though appreciable, is not sufficient to prevent reception of natural electromagnetic background, most of which is believed to originate with tropical lightning and to be propagated as Schumann resonance modes in the earth-ionosphere cavity. (Author)

Descriptors :   (*SIGNALS, EXTREMELY LOW FREQUENCY), (*EXTREMELY LOW FREQUENCY, SIGNALS), (*INTERFERENCE, EXTREMELY LOW FREQUENCY), CANADA, NOISE, ELECTROMAGNETIC RADIATION, MEASUREMENT, BANDWIDTH, MODULATION, MAGNETIC FIELDS, PROPAGATION

Distribution Statement : APPROVED FOR PUBLIC RELEASE