High latitude electron and proton precipitation at different local times and magnetic activity

Wedde, T.; Skovli, G.; Amundsen, R.; Aarsnes, K.; Lindalen, H.R.; Søraas, F.

doi:10.1016/0021-9169(73)90137-2

Cited by 10 publications

(2 citation statements)

References 16 publications

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“…The spikes at all energies studied by the aforementioned authors typically occur at considerably higher latitudes than those reported here. The flux enhancements of lower-energy electrons may be very pronounced; i.e., Wedde et al [1973] report the common observation of intensity rises and falls of more than 4 orders of magnitude within quite narrow latitude bands.…”

Section: Energy Spectramentioning

confidence: 84%

“…It is important fo compare the electron spikes presented here with those studied by other groups. The morphology of the spikes involving nonrelativistic electrons [McDiarmid and Burrows, 1965;Hoffman and Evans, 1968;Wedde et al, 1973;Imhofet al, 1975b] is of less direct concern here. The spikes at all energies studied by the aforementioned authors typically occur at considerably higher latitudes than those reported here.…”

Section: Energy Spectramentioning

confidence: 99%

See 1 more Smart Citation

Narrow spikes in the selective precipitation of relativistic electrons at mid-latitudes

Imhof¹,

Reagan²,

Nakano³

et al. 1977

J. Geophys. Res.

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Relativistic electron precipitation spikes have been observed in the quasi-trapped population at midlatitudes (L • 3.5-4.5). The spike electrons are not in the local loss cone but precipitate into the atmosphere upon drift in longitude. In these spikes, often as narrow as 0.3 ø in invariant latitude, the fluxes of electrons >•4 M eV may undergo pronounced enhancements, whereas the intensities of electrons in the few hundred keV range may not be significantly affected. This energy selectivity in the formation of the spikes is perhaps more suggestive of wave-particle interactions, such as the Thorne and Kennel (1971) mechanism for the scattering of relativistic electrons by Doppler-shifted ion cyclotron waves, rather than of changes in the magnetic field topology. The data were taken from the low-altitude (--•750 km) polarorbiting satellite (1972-076B) with an array of several electron detectors having widely differing geometric factors and energy ranges of response. Energy spectra and pitch angle distributions were measured over the energy range 160 keV to 2.4 MeV with a combination of three spectrometers. Fluxes of energetic (>4 MeV) electrons were measured with a high sensitivity in each of two large (--•3.4 kg) plastic scintillator anticoincidence counters surrounding a germanium spectrometer.

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Section: Energy Spectramentioning

confidence: 84%

Section: Energy Spectramentioning

confidence: 99%