Periodic fluctuations in the Earth-ionosphere waveguide
作者： Paul A. Bernhardt , Kent M. Price , James H. Crary
关键词: Solar flare 、 Phase (waves) 、 Physics 、 Atmosphere of Earth 、 Amplitude 、 Longitude 、 Earth–ionosphere waveguide 、 Ionosphere 、 Geophysics 、 Variation (astronomy) 、 Earth-Surface Processes 、 Ecology (disciplines) 、 Earth and Planetary Sciences (miscellaneous) 、 Space and Planetary Science 、 Palaeontology 、 Forestry 、 Aquatic science 、 Atmospheric Science 、 Soil science 、 Geochemistry and Petrology 、 Oceanography 、 Water Science and Technology
摘要: VLF phase and amplitude measurements made in 1967 at Byrd Station, Antarctica, using 18.6-kHz transmissions from NLK, Washington, have been analyzed for lunar-induced hebdomadal variations. The propagation path was 14,250 km length nearly constant longitude. variations are found to be ±18° ±0.26 dB explained by height changes the D region of ionosphere. variation shows a 0.46-dB increase during Sunday daylight hours, relative Monday-Saturday average, is ascribed man-made region.
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