DTIC ADA045321: Plasma Waves in the Polar pdf

DTIC ADA045321: Plasma Waves in the Polar

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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

• Creator/s: Defense Technical Information Center
• Date: 7/1/1977
• Year: 1977
• Book Topics/Themes: DTIC Archive, Gurnett, D A, IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY, *GEOPHYSICS, *PLASMA WAVES, POLAR REGIONS, MAGNETIC FIELDS, BACKGROUND NOISE, MAGNETOSPHERE, EXTREMELY LOW FREQUENCY, SCIENTIFIC SATELLITES, ULTRALOW FREQUENCY, WHISTLERS

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