Plasma waves in the polar cusp: Observations from Hawkeye 1

Details Plasma waves in the polar cusp: Observations from Hawkeye 1 Plasma waves in the polar cusp: Observations from Hawkeye 1

Jul 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977iowa.repts....g&link_type=abstract

Progress Report Iowa Univ., Iowa City. Dept. of Physics and Astronomy.

Physics

Geophysics

Cusps (Landforms), Geophysics, Hawkeye Satellites, Plasma Waves, Polar Regions, Background Noise, Earth Magnetosphere, Geomagnetism, Whistlers

Scientific paper

In this paper we investigate the characteristics of plasma waves observed by the Hawkeye 1 spacecraft in the vicinity of the polar cusp. The primary types of plasma waves associated with the polar cusp are (1) a band of ULF-ELF magnetic noise extending from a few Hz to several hundred Hz, (2) a broad-band electrostatic emission extending from a few Hz to about 30 to 100 kHz, with maximum intensities at about 10 to 50 Hz, (3) electrostatic electron cyclotron waves near the electron gyrofrequency and (4) whistler-mode auroral hiss emissions. Of these various types of waves, only the ULF-ELF magnetic noise is uniquely associated with the cusp in the sense that the noise can be used as a reliable indicator of the polar cusp region. All of the other types of plasma waves occur in regions adjacent to the polar cusp as well as in the cusp itself.

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