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dc.contributor.authorHendtlass, Ralph Ernest
dc.date.accessioned2013-06-07T00:59:58Z
dc.date.available2013-06-07T00:59:58Z
dc.date.issued1973
dc.identifier.urihttp://hdl.handle.net/10179/4574
dc.description.abstractThis thesis examines a possible explanation for some of the time variations of the night-time sky wave at distances between 80 and 160km from low-medium-frequency transmitters. In the postulated model this variation is explained in terms of interference between the signals travelling along many paths from the transmitter to the receiver via a lower ionosphere disturbed by the passage of a ducted acoustic wave. A rigorous solution to this model is not possible, but by using reasonable approximations a solution is obtained which is suitable for analysing experimental records of sky wave variations. These experimental records were obtained by using an interferometer technique to separate the sky wave from the ground wave. Some extremely good agreement was found between theory and experiment showing that this could be a useful technique for studying ducted acoustic waves. Certainly some, at least, of the variations commonly observed in the night-time sky wave signal are caused in this way.en
dc.language.isoenen
dc.publisherMassey Universityen_US
dc.rightsThe Authoren_US
dc.subjectRadio wavesen
dc.subjectIonosphereen
dc.subjectIonospheric radio wave propagationen
dc.titleIonospheric reflections at medium frequencies : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Physics at Massey Universityen
dc.typeThesisen
thesis.degree.disciplinePhysicsen
thesis.degree.grantorMassey Universityen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophy (Ph.D.)en


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