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Measurement of polarization characteristics of VHF radio waves reflected by the Es layer

✍ Scribed by Masaru Ichinose; Syoji Kainuma

Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
784 KB
Volume
78
Category
Article
ISSN
8756-6621

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✦ Synopsis

To investigate the change of the rotation of the polarization plane of the very-high frequency (VHF) radiowave after reflection by the sporadic E layer, a television wave transmitted from Seoul, Korea, was measured in Tokyo.

In this paper, the measurement principle and equipment for the rotation of the polarization plane are described. From the measured results, it is shown that most of the measured values have rotation by a certain angle from the polarization state of the transmission and exhibit fine changes swiftly and randomly within 40 to 90" centered at the rotated angle. Sometimes, there is a case of slow rotation from +90Β° to -90". Further, the cause of the rotating characteristics of the polarization plane is presented from the Faraday rotation theory.

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