Physics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87..643h&link_type=abstract
Journal of Geophysical Research, vol. 87, Feb. 1, 1982, p. 643-650.
Physics
67
Earth Magnetosphere, Extremely Low Radio Frequencies, Ion Beams, Magnetohydrodynamic Waves, Plasma Diagnostics, Bow Waves, International Sun Earth Explorers, Magnetometers, Shock Wave Propagation
Scientific paper
A new class of upstream wave is reported with relatively high frequencies of about 1 Hz and small amplitudes compared to the more common larger amplitude, low-frequency (0.03 Hz) upstream wave. The waves were first noted in association with beams of ions reflected back upstream at the bowshock, and although beam presence appears to be a necessary condition for the observation of the waves, it is not a sufficient condition for the existence of the waves. Magnetometer measurements are used to determine intrinsic properties of the waves, and simultaneous two point measurements are used to calculate and eliminate Doppler shifting effects. Results indicate that the waves are right-hand elliptically polarized whistler mode waves with plasma rest frame frequencies of about 20-100 times the proton gyrofrequency and wavelengths of about 100 km.
Eastman Timothy E.
Frank Louis A.
Hoppe Michael
Russell Christopher T.
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