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- W2038858607 abstract "HF noise (2-8 MHz) as a function of azimuth, frequency, and time of day was measured in England during the winter of 1966-1967. For a given frequency interval eight unequal azimuthal sectors (with five sectors between 45°-180°) were sampled each four hours in a standardized fashion. Power levels for the tenth, fiftieth, and ninetieth percentiles were derived and plotted. The results provide the integrated total external noise (both local and propagated). In addition to the well-known distinctive diurnal and frequency changes, a marked variation with azimuth is present. A separate examination of noise intensities measured simultaneously from several azimuths reveals strong differences with azimuth. The investigation indicates that noise levels as a function of azimuth are needed and are the ones to be applied to practical HF systems." @default.
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- W2038858607 date "1972-02-01" @default.
- W2038858607 modified "2023-10-14" @default.
- W2038858607 title "Azimuthal Variation of Measured HF Noise" @default.
- W2038858607 cites W2021441749 @default.
- W2038858607 doi "https://doi.org/10.1109/temc.1972.303201" @default.
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