Plasmaspheric hiss observed in the topside ionosphere at mid- and low-latitudes

Ondoh, T.; Nakamura, Y.; Watanabe, Shigeto; Aikyo, K.; Murakami, T.

doi:10.1016/0032-0633(83)90155-1

Cited by 22 publications

(13 citation statements)

References 13 publications

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“…The probable and plausible candidate is plasmaspheric ELF hiss (ONDOH et al, 1983;HAYAKAWA et a!., 1985aHAYAKAWA et a!., , 1985b, but its upper cutoff frequency is considered to only rarely extend up to 3.2kHz. However, we have found very few emissions with small mean/ minimum ratios less than 5dB, which might be either the effect of relatively wide-banded plasmaspheric ELF hiss, as found in ONDOH et al (1983) andHAYAKAWA et al (1985a), or wide-band VLF The second point, the geographic location, is discussed next. Figure 3 indicates the clear association of the active regions of low-and equatorial-latitude emissions with the main centers of thunderstorms as given in HAYAKAWA (1989).…”

Section: Diurnal Intensity Variationmentioning

confidence: 99%

“…Then, medium-latitude VLF emissions are found to be generally generated at geomagnetic latitudes just around the plasmapause. Many of these emissions are closely associated with geomagnetic storms and are excited by energetic electrons in the outer radiation belt in terms of cyclotron instability (BULLOUGH et al, 1969;HAYAKAWA et al, 1977;ONDOH et al,1983). GURNETT (1968) identified a third region of VLF emissions based on the limited VLF data from the Injun 3 satellite at low latitudes, and later the Ariel 3 satellite has observed those emissions based on data from three months with full local time coverage (LEFEUVRE and BULLOUGH, 1973).…”

Section: Introductionmentioning

confidence: 99%

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Satellite observation of low-latitude VLF radio noises and their association with thunderstorms.

Hayakawa

1989

J. geomagn. geoelec

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Section: Diurnal Intensity Variationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Satellite observation of low-latitude VLF radio noises and their association with thunderstorms.

Hayakawa

1989

J. geomagn. geoelec

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“…Studies by polar-orbiting ionospheric satellites (e.g. Thorne et al, 1974;Smith et al, 1974;Ondoh et al, 1983) showed that characteristics of the ionospheric ELF hiss is very similar to those of the plasmaspheric ELF hiss, and thus the ionospheric ELF hiss is considered to be generated in the plasmasphere. Muzzio and Angerami (1972) and Ondoh et al (1983) showed, by means of the ray-tracing method, that whistler mode waves with a large wave-normal angle in the plasmaspheric equatorial region can penetrate into the ionosphere, indicating that the ionospheric ELF hiss is the penetrated component of the plasmaspheric ELF hiss.…”

Section: Relationship To Energetic Particles and Ionospheric Elf Hissmentioning

confidence: 99%

LHR band emissions at mid-latitude and their relationship to ionospheric ELF hiss and relativistic electrons

et al. 2005

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Abstract. LHR band emissions observed at mid-latitude were investigated using data from the EXOS-C (Ohzora) satellite. A typical feature of the LHR band emissions is a continuous banded structure without burst-like and cut-off features whose center frequency decreases as the satellite moves to higher latitudes. A statistical analysis of the occurrence characteristics of the phenomena showed that midlatitude LHR emissions are distributed inside the plasmapause during magnetically quiet periods, and the poleward boundary of the emission region moves to lower latitudes as the magnetic activity increases. The altitude distribution of the waves suggests that the propagation in the LHR duct formed horizontally in the mid-latitude upper-ionosphere. The emission is closely related to the occurrence of ionospheric ELF hiss. It is also shown that LHR emissions are commonly observed in the slot region of the radiation belt, and they sometimes accompany the enhancement of the ionospheric electron temperature. The generation of the LHR band emissions is discussed based on the observed characteristics.

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“…It is the reason why the statistical procedure is used in this paper to discriminate between power line radiations and background noise. Two radiation sources can be considered for the origin of the background noises: ELF hisses propagating from the outer plasmasphere (THORNS et al, 1973;TSURUTANI et al, 1975;ONDOH et al, 1983) and atmospherics propagating through the ionosphere.…”

Section: Origin Determination Of Background Magnetic Field At 55hzmentioning

confidence: 99%

“…Occurrence probability of ELF hisses observed at low altitudes is related to local time (TSURUTANI et al, 1975;ONDOH et al, 1983). And occurrence probability of atmospherics also depends on local time (SAO, 1981;KOHTAKI and KATOH, 1982).…”

Section: Origin Determination Of Background Magnetic Field At 55hzmentioning

confidence: 99%

Power line radiation observed by the satellite "OHZORA"

Tomizawa

Yoshino

1985

J. geomagn. geoelec

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The magnetic field strength at the fundamental frequencies 50Hz and 60 Hz, of power line radiation in the topside ionospheric region has been observed by the instrument aboard the satellite "OHZORA"in the global area. The observation has started on June 1, 1984, in order to measure the magnetic field strength of the power line radiation in the topside ionospheric region over the eastern Asia. The observation instrument consists of a loop antenna and a receiving unit, which can receive the fundamental frequencies (50 and 60Hz) of power line radiation by means of three narrow-bandwidth filters. It is identified that the origin of the background noises of magnetic fields observed at these frequencies is due to the ELF hisses propagating from the outer plasmasphere.By means of the statistical procedure, the background noise field strength at 50 or 60Hz can be determined in comparison with the strength at 55Hz. If the magnetic field strength is higher than the level of ambiguity, the corresponding position can be specified as the reasonable position of power line radiation. According to the result of observation, the power line radiation at 60Hz radiated from the Japan Islands seems to spread over the wide area. The observation results also show that the power line radiation over the eastern China reveals a correlation between the statistically reasonable positions of magnetic field strength at 50Hz and the possible distribution of power lines on the ground.

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Plasmaspheric hiss observed in the topside ionosphere at mid- and low-latitudes

Cited by 22 publications

References 13 publications

Satellite observation of low-latitude VLF radio noises and their association with thunderstorms.

Satellite observation of low-latitude VLF radio noises and their association with thunderstorms.

LHR band emissions at mid-latitude and their relationship to ionospheric ELF hiss and relativistic electrons

Power line radiation observed by the satellite "OHZORA"

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