LHR whistlers and lhr spherics in the outer ionosphere |
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Institution: | 1. Laboratory of Psychosomatics and Clinimetrics, Department of Psychology, University of Bologna, Viale Berti Pichat 5, 40127 Bologna, Italy;2. Baruch Ivcher School of Psychology, Interdisciplinary Center Herzliya, P. O. Box 167, 46150 Herzliya, Israel |
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Abstract: | Special types of VLF signals, which follow whistlers and spherics and have an anomalous dispersion near the lower hybrid resonance (LHR) frequency, have been observed on the low-altitude Intercosmos satellites. These signals have been named LHR whistlers and LHR spherics, respectively. A mechanism is suggested for the formation of their spectra, based on the peculiarities of quasi-resonance wave propagation at frequencies near the LHR frequencies. It is shown that the large dispersion observed may be accounted for by a significant increase in the propagation time of the wave as its frequency approaches the maximum in the LHR frequency profile. |
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