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Polar VLF Emissions Observed by ISIS Satellites

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Environmental and Space Electromagnetics

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Abstract

Polar VLF emissions received from ISIS-1 and -2 at Syowa station, Antarctica inculde polar cusp hiss,auroral hiss, VLF saucer and ELF hiss. High-latitude limit of ELF hiss approximately follows the auroral zone. A polar map of the occurrence rate for broad-band auroral hiss, obtained from ISIS VLF data, is compared to one for the occurrence locations of inverted-V electron precipitations, obtained from Atmospheric Explorer(AE)-D. The occurrence map for broad-band auroral hiss is qualitatively similar to that for the inverted-V electron precipitations; concerning the low-latitude boundary and axial symmetry of the 10–22 hour geomagnetic local time(MLT) meridian. So, the polar occurrence map for broad-band auroral hiss is different from the auroral zone which has the axial symmetry of the noon-midnight meridian. The broad-band auroral hiss seems to be generated by inverted-V electrons precipitated from the boundary plasma sheet, but not by auroral electrons. The broad-band auroral hiss should be hereafter called by the name of the polar hiss. The frequency range of the broad-band auroral hiss is discussed in terms of whistler-mode Cherenkov radiation from inverted-V electrons.

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Authors and Affiliations

  1. Office for Space Science, Communications Research Laboratory, Tokyo, 184, Japan

    T. Ondoh

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  1. T. Ondoh
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  1. College of Science & Technology, Nihon University, 1-8-14, Kanda Surugadai, 101, Chiyoda-ku, Tokyo, Japan

    Hiroshi Kikuchi (Professor, URSI Commission E Chairman) (Professor, URSI Commission E Chairman)

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© 1991 Springer-Verlag Tokyo

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Ondoh, T. (1991). Polar VLF Emissions Observed by ISIS Satellites. In: Kikuchi, H. (eds) Environmental and Space Electromagnetics. Springer, Tokyo. https://doi.org/10.1007/978-4-431-68162-5_14

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  • DOI: https://doi.org/10.1007/978-4-431-68162-5_14

  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-68164-9

  • Online ISBN: 978-4-431-68162-5

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