Examination of VLF/LF Propagation Effects as a Function of Frequency.

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Abstract:

Technological development in VLFLF engineering has progressed sufficiently so that a practical interest in the design and construction of wide-band communication systems has developed. The report demonstrates that the variability in phase and amplitude of propagated VLFLF radio waves needs careful evaluation when wide-band modulation schemes are considered. This variability is examined as a function of frequency for a variety of environmental parameters by two methods. The first method is by an analytical study using a theoretical wave hop propagation model for establishing general concepts of conditions which may be encountered, and the second is an examination of propagation data acquired with a VLFLF multifrequency sounder. Author

Author(s):
Hildebrand, Verne E. ; Morfitt, David G.
Author Organization(s):
NAVAL WEAPONS CENTER CORONA LABS CA
Descriptive Note:
Technical pub.,
Pagination:
0080

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NWCCL-TP-886, GIDEP-347.00.00.00-X7-105
Project Number(s):
PME-117, NWC-PO-9-4005
Monitor Series:
347.00.00.00-X7-105
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*RADIO TRANSMISSION, VERY LOW FREQUENCY), COMMUNICATION AND RADIO SYSTEMS, LOW FREQUENCY, IONOSPHERIC PROPAGATION, PERIODIC VARIATIONS, ATMOSPHERIC SOUNDING, MATHEMATICAL MODELS, PHASE
Field(s)/Group(s):
Radiofrequency Wave Propagation, Radio Communications
Report Date:
1969 Dec 01