Physics
Scientific paper
Mar 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.1391b&link_type=abstract
Journal of Geophysical Research, vol. 81, Mar. 1, 1976, p. 1391-1396.
Physics
6
Equatorial Electrojet, Ionospheric Electron Density, Magnetohydrodynamic Stability, Radar Echoes, Sporadic E Layer, Ionograms, Ionosondes, Power Spectra, Spectral Energy Distribution, Spectrum Analysis, Very High Frequencies
Scientific paper
The nature of electron density irregularities responsible for equatorial sporadic E (Esq) echoes observed on standard equatorial ionograms is examined. Three different types of data are considered, which taken together shed light on the irregularity structure at lower frequencies. The evidence presented points strongly to the fact that Esq echoes seen by conventional ionosondes in equatorial regions arise from irregularities produced by the gradient drift instability, and that the two-stream (type 1) irregularities are not discernible at ionosonde wavelengths in the range 1-10 MHz.
Balsley Ben B.
Rey Andrea
Woodman Ronald F.
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