VLF PROPAGATION AND NOISE MEASUREMENTS IN THE PACIFIC
Abstract
During May, June and July of 1965 the received field intensity from both VLF stations on Oahu island, Hawaii were measured at Tokyo, Japan; Guam; and Boulder, Colorado. Atmospheric noise field intensities were also measured at all three sites and relative phase variations of the received signals were measured at Japan and Guam. The results of this measurement program are presented in a number of ways in this report to afford maximum opportunity to study the propagation and atmospheric noise conditions. The results show 22.3 and 24.0 kHz to be the best frequencies of those measured for the Oahu to Guam and Japan paths. Significantly, the diurnal variations of field intensity were very repeatable even during sunset and sunrise transition times which indicates that better predictions of VLF feeld intensities may be possible with an improved propagation model. Means, medians, standard deviations, cumulative probabilities and diurnal variations of signal, noise and signal-to-noise-ratios have been computed, plotted and tabulated for all frequencies and for four hour time blocks and twenty-four hour periods. In addition, continuous plots of signal data for Japan and Guam are presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1966
- Accession Number
- AD0479833
Entities
People
- E. L. Maxwell