Examination of VLF/LF Propagation Effects as a Function of Frequency.
Abstract
Technological development in VLF/LF 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 VLF/LF 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 VLF/LF multifrequency sounder. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1969
- Accession Number
- AD0865147
Entities
People
- David G. Morfitt
- Verne E. Hildebrand
Organizations
- Naval Air Weapons Station China Lake