Hectometric Line Spectra Detected by the Arase (ERG) Satellite

Hashimoto, K.; Kumamoto, A.; Tsuchiya, F.; Kasahara, Yoshiya; Matsuoka, Ayako

doi:10.1029/2018gl080133

Cited by 6 publications

(19 citation statements)

References 17 publications

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“…The possible scenario proposed by Hashimoto et al (2018) is examined first based on the above evidence. The numbers correspond to those of the scenario.…”

Section: Discussionmentioning

confidence: 99%

“… Arase PWA/HFA observation from 08:12 UT to 08:37 UT on 30 June 2017 (After Figure 1 of Hashimoto et al., 2018). …”

Section: Instruments and Characteristics Of Hlsmentioning

confidence: 92%

“…Hashimoto et al. (2018), however, reported that the Arase satellite observed line spectra in this MW range in the hectometric wavelengths. They are mostly broadcasting waves, but additional waves are occasionally mixed in these spectra, which were named as Hectometric Line Spectra (HLS) by them.…”

Section: Introductionmentioning

confidence: 90%

“…Other dynamic emissions can be seen in Figure 2 of Hashimoto et al (2018) and S2 of its supporting information with the frequency resolution of 12.2 kHz. Some emissions are observed in a channel between two signals.…”

Section: Stimulated Emissions Of Hlsmentioning

confidence: 99%

“… Arase PWA/HFA observation from 21:35 to 22:00 UT on 31 December 2017 (revised from Figure 3 of Hashimoto et al., 2018). …”

Section: Stimulated Emissions and Hls Not Related To Plasma Bubblesmentioning

confidence: 99%

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Propagation Mechanism of Medium Wave Broadcasting Waves Observed by the Arase Satellite: Hectometric Line Spectra

et al. 2021

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The nonthermal terrestrial continuum (NTC) at frequencies between about 30 and 110 kHz was first characterized by Shaw (1973) andGurnett (1975). These emissions are found to originate at the plasma frequency at steep density gradients in the plasmapause and magnetopause regions of the Earth's magnetosphere. Later, a higher frequency component of the terrestrial continuum, which appears to be generated inside the Earth's plasmasphere, was first detected by the Geotail satellite at a frequency of 100-800 kHz, corresponding to the plasma frequency inside the plasmasphere at an altitude extending down to only a few thousand kilometers in the topside equatorial region of the Earth's ionosphere (Hashimoto et al., 1999(Hashimoto et al., , 2006Green & Boardsen, 2006). This component is referred to as the "kilometric continuum (KC)".

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“…The possible scenario proposed by Hashimoto et al (2018) is examined first based on the above evidence. The numbers correspond to those of the scenario.…”

Section: Discussionmentioning

confidence: 99%

“… Arase PWA/HFA observation from 08:12 UT to 08:37 UT on 30 June 2017 (After Figure 1 of Hashimoto et al., 2018). …”

Section: Instruments and Characteristics Of Hlsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 90%

Section: Stimulated Emissions Of Hlsmentioning

confidence: 99%

“… Arase PWA/HFA observation from 21:35 to 22:00 UT on 31 December 2017 (revised from Figure 3 of Hashimoto et al., 2018). …”

Section: Stimulated Emissions and Hls Not Related To Plasma Bubblesmentioning

confidence: 99%

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Propagation Mechanism of Medium Wave Broadcasting Waves Observed by the Arase Satellite: Hectometric Line Spectra

et al. 2021

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Observations by DEMETER of Man‐Made MF Waves Escaping From the Ionosphere

Parrot

2021

JGR Space Physics

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Man-made medium frequency (MF) waves are in a frequency range between 300 kHz and 3 MHz. They are typically used by broadcasting, radio-navigation (maritime and aeronautical), and maritime mobile communications. They propagate in the Earth-ionosphere waveguide (Milsom, 2003). Normally they are reflected and cannot cross the ionosphere because their frequencies are lower than the plasma frequency in the F layer. But there is a possibility for these waves to cross the ionosphere if they follow a magnetic field line. Individual observations of broadcast transmitters above the F layer have been already done (Hashimoto et al., 2018; LaBelle et al., 1989; Kaiser et al., 1996; Kelley et al., 1997). Concerning the low altitude satellite DEMETER, if the recorded MF spectra are averaged over a large time interval, the transmitter locations appear on a terrestrial map of wave activity as hot spots which are a little bit shifted equatorwards due to their propagation along a magnetic field line (

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