WHISTLER-MODE HISS AT LOW AND MEDIUM FREQUENCIES IN THE DAYSIDE-CUSP IONOSPHERE

Authors
  1. James, H.G.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
Simultaneous measurements from the Isis 1 satellite of soft-electron fluxes and of auroral hiss at low and medium frequencies indicate that such noise emissions can propagate to the north or south of the L shell containing the precipitating electrons through distances up to 1000 km or about 3 degrees invariant latitude at 2000 km altitude. This latitudinal spreading suggets that the noise propagation corresponds to those parts of the whistler-mode dispersion curves where the waves are electric, that is, near the resonance cone. The relative variations of the LF and MF spectra can be roughly accounted for by a simple ray-tracing technique assuming electric waves. Ionograms recorded at the same time as the noise measurements were reduced to real height profiles of electron density, thus giving a two-dimensional ambient electron distribution for ray tracing. TRUNCATED
Date of publication
01 Jan 1973
Number of Pages
22
Reprinted from
J of Geophysical Research, vol 78, no 22, 1973, p 4578-4599
DSTKIM No
74-02262
CANDIS No
78384
Format(s):
Hardcopy

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