Accession Number : AD0615465

Title :   ON VARIATIONS IN THE PHASE VELOCITY OF VERY LOW FREQUENCY SIGNALS OBSERVED IN NEW ZEALAND.

Descriptive Note : Final rept.,

Corporate Author : DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH LOWER HUTT (NEW ZEALAND) PHYSICS AND ENGINEERING LAB

Personal Author(s) : Crombie,D. D. ; Allan,A. H. ; Burtt,G. J.

Report Date : 06 JAN 1965

Pagination or Media Count : 34

Abstract : Observations of changes in the phase delay of VLF signals from GBR, NBA and NPG have been made in New Zealand. The phase reference signal is provided by Essen ring oscillators of high stability. The observed changes in phase delay due to diurnal variation of path illumination, interference between signals received over both the long and short great circle paths, interference between two or more modes propagating in the same direction, a solar eclipse, and interference between signals propagating simultaneously in the earth-ionosphere wave-guide and in magneto-ionic whistler ducts are described and discussed. (Author)

Descriptors :   (*VERY LOW FREQUENCY, PHASE SHIFT CIRCUITS), (*PHASE SHIFT CIRCUITS, RADIO INTERFERENCE), (*RADIO SIGNALS, PHASE SHIFT CIRCUITS), NEW ZEALAND, DIURNAL VARIATIONS, SOLAR ECLIPSES, WHISTLERS, IONOSPHERIC PROPAGATION, WAVEGUIDES

Distribution Statement : APPROVED FOR PUBLIC RELEASE