Physics
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jatp...54.1021m&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 54, no. 7-8, July-Aug. 1992, p. 1021-1042. Research suppor
Physics
22
Earth Magnetosphere, Extremely Low Radio Frequencies, Geomagnetic Pulsations, Polar Cusps, Radio Emission, Radio Spectra
Scientific paper
ULF wave phenomena recorded in the Pc1-2 range at high latitudes are shown to be useful in the identification of cusp and boundary layers by comparison with the results of magnetic pulsation data. The geomagnetic pulsation data in the Pc1-2 range are recorded at six auroral-zone and polar-cap stations with riometer, ionosonde, Pc5, and low-altitude satellite particle data. The spectral characteristics of the 0.1-2.5 Hz ULF emissions include unstructured and quasistructured emissions in the 0.2-0.3 Hz and 0.25-0.5 Hz ranges, respectively. The emissions are shown to be significantly unlike the discrete, structured, and narrowband emissions measured at points equatorward of the cusp. The present methodology demonstrates the effectiveness of using ground-based measurements of Pc1-2 pulsations to monitor the high-latitude features of the magnetospheric cusp and cleft.
Fraser Brian J.
Hansen H. J.
Meng Ching I.
Menk Frederick W.
Morris James R.
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