THE USE OF COMPOSITE SIGNALS AT VERY LOW RADIO FREQUENCIES.

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 compare...

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Bibliographic Details
Main Author: Pierce,J. A.
Other Authors: HARVARD UNIV CAMBRIDGE MASS DIV OF ENGINEERING AND APPLIED PHYSICS
Format: Text
Language:English
Published: 1968
Subjects:
Radiofrequency Wave Propagation
(*RADIO NAVIGATION
VERY LOW FREQUENCY)
(*IONOSPHERIC PROPAGATION
VELOCITY)
RADIO SIGNALS
TIME
PHASE
ANOMALIES
DIURNAL VARIATIONS
ARCTIC REGIONS
EXPERIMENTAL DATA
COSTS
*OMEGA PROJECT
Arctic
Online Access:http://www.dtic.mil/docs/citations/AD0666567
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0666567
Description
Summary: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)

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