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Phase velocities of irregularities in the equatorial electrojet.Spectral decomposition of the power spectrum of radar echoes at 50 MHz from the equatorial electrojet reveals information as to the phase velocities of several classes of electron density irregularities and permits inferences as to the electron drift velocity and the electron and ion temperatures in the electrojet. In particular, it is shown that the phase velocity of two-stream irregularities is comparable to the ion-acoustic speed and independent of the horizontal phase velocity of coexistent non-two-stream irregularities. The latter can exceed the ion-acoustic speed and is probably a measure of the electron drift velocity. Thus a probable inference is that the electron drift velocity can itself be supersonic, contrary to some existing theoretical opinions.
Document ID
19730045170
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cohen, R.
(NOAA, Aeronomy Laboratory, Boulder Colo., United States)
Date Acquired
August 7, 2013
Publication Date
May 1, 1973
Publication Information
Publication: Journal of Geophysical Research
Volume: 78
Subject Category
Geophysics
Accession Number
73A29972
Funding Number(s)
CONTRACT_GRANT: NASA ORDER R-06-012-008
Distribution Limits
Public
Copyright
Other

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