Accession Number : AD0666567

Title :   THE USE OF COMPOSITE SIGNALS AT VERY LOW RADIO FREQUENCIES.

Descriptive Note : Technical rept.,

Corporate Author : HARVARD UNIV CAMBRIDGE MASS DIV OF ENGINEERING AND APPLIED PHYSICS

Personal Author(s) : Pierce,J. A.

Report Date : FEB 1968

Pagination or Media Count : 36

Abstract : When the time of arrival of a VLF transmission is measured at two frequencies the two components can be combined to form a 'composite signal.' This signal, when the transmission is chiefly determined by a single mode of propagation, has advantages in stability and predictability as compared with either one of the carrier-frequency signals or with the difference-frequency signal. (Author)

Descriptors :   (*RADIO NAVIGATION, VERY LOW FREQUENCY), (*IONOSPHERIC PROPAGATION, VELOCITY), RADIO SIGNALS, TIME, PHASE, ANOMALIES, DIURNAL VARIATIONS, ARCTIC REGIONS, EXPERIMENTAL DATA, COSTS

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE