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- W2006944680 abstract "Abstract This paper presents the results of ionospheric absorption measurements conducted at Waltair (Latitude 17.7°N, Longitude S3.3°: E and Geomagnetic Latitude 7.4°N) during the International Geophysical Year and International Geophysical Co-operation periods on a frequency of 5.65 Mc/s. The solar zenith distance variation of diurnal and seasonal data of absorption follows a law of the form 8.7 ¦log e p¦ = A 1 · (ƒ) −2 · cos n % dB only as an approximation. The variation of the cos % index has a significant negative correlation with Zurich relative sunspot number R. The monthly mean diurnal variation as well as seasonal noon-time variation of absorption confirms, more precisely, to a law of the form ¦log e p¦ = A' + B . F(ƒ 0 E/ƒ) cos % nepers where A' is a constant expected to refer to the non-deviative absorption in lower D-region. A' is found to vary linearly with R. A method is suggested to estimate the relative amounts of D- and E-region absorption at noon from the cos % index data. The absorption ¦loge p¦ and A' are found to vary inversely as the square of the operating frequency." @default.
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- W2006944680 date "1961-09-01" @default.
- W2006944680 modified "2023-09-28" @default.
- W2006944680 title "Investigation of ionospheric absorption on 5·65 Mc/s at Waltair" @default.
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- W2006944680 doi "https://doi.org/10.1016/0021-9169(61)90172-6" @default.
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