Rocket observations at the northern edge of the eastward electrojet

Details Rocket observations at the northern edge of the eastward electrojet Rocket observations at the northern edge of the eastward electrojet

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.3407c&link_type=abstract

Journal of Geophysical Research, vol. 85, July 1, 1980, p. 3407-3413.

Computer Science

Sound

3

Auroral Arcs, Electrojets, Rocket Sounding, Satellite Observation, Electric Fields, Electron Precipitation, Field Aligned Currents, Flux (Rate), Ionospheric Currents, Magnetic Disturbances, Magnetohydrodynamic Flow, Ohmic Dissipation, Resistance Heating, Spacecraft Trajectories

Scientific paper

The paper discusses a Nike-Tomahawk rocket launched north over quiet, late evening auroral arcs in March 1975. A northward magnetic disturbance was observed on the ground under the rocket trajectory; south of the arcs the northward electric field was 60 mV/m, indicating strong westward plasma flow. An eastward electrojet current layer was penetrated in the upward flight, and precipitating electrons were observed over each arc. Using the observed electron flux and a model of the ionosphere, the Hall and Pedersen conductivities were calculated which were used to compute the eastward and northward components of the horizontal ionospheric currents. The joule power decreased abruptly in the auroral arcs, as the precipitating electron power increased; the total dissipated power was the same inside the arcs, between them and southward. North of the aurora the electric field and dissipated power remained low; field-aligned currents carried by the observed electrons were about a factor of 3 lower than those inferred from the magnetic field measurements.

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