Rocket-borne particle, field, and plasma observations in the cleft region

Details Rocket-borne particle, field, and plasma observations in the cleft region Rocket-borne particle, field, and plasma observations in the cleft region

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..345u&link_type=abstract

Geophysical Research Letters, vol. 2, Aug. 1975, p. 345-348. Research supported by the Danish National Science Research Council

Computer Science

Sound

2

Electric Fields, Ionospheric Sounding, Magnetic Fields, Particle Flux Density, Rocket Sounding, Thermal Plasmas, Ionospheric Electron Density, Magnetic Measurement, Magnetohydrodynamic Stability, Plasma Diagnostics, Polar Caps

Scientific paper

Results are reported for comprehensive observations of magnetic and electric fields together with ambient and suprathermal plasmas above the dayside auroral oval with rocket-borne instrumentation which penetrated the cleft region. Measurements were also obtained equatorward and poleward of the cleft. Convection velocities as inferred from electric-field measurements were generally toward noon equatorward of the cleft and were antisunward over the polar cap. Observations of electron temperatures, electric fields, and low-frequency electrostatic noise provide strong evidence of a plasma instability (Farley-Buneman) in the E-layer associated with the appearance of the 'slant E condition' identified in ground-acquired ionograms. The positions of these measurements relative to that of the cleft were firmly established via the determination of the plasma environment with an electrostatic analyzer.

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