Computer Science – Sound
Scientific paper
Oct 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.3961b&link_type=abstract
Journal of Geophysical Research, vol. 80, Oct. 1, 1975, p. 3961-3972.
Computer Science
Sound
5
Auroras, Current Density, Ionospheric Currents, Polar Substorms, Rocket Sounding, Electric Fields, Electrostatic Probes, Ionospheric Conductivity, Rocket-Borne Instruments, Vertical Distribution, Wind Velocity
Scientific paper
A Nike Tomahawk sounding rocket was launched into a 400-gamma auroral substorm from Esrange, Kiruna, Sweden. The rocket instrumentation included a split Langmuir-probe plasma-velocity detector and a double-probe electric-field detector. Above 140-km altitude, the electric field deduced from the ion-flow velocity measurement and the electric field measured by the double probe agree to an accuracy within the uncertainties of the two measurements. The difference between the two measurements at altitudes below 140 km provides an in situ measurement of current density and conductivity. Alternatively, if values for the conductivity are assumed, the neutral-wind velocity can be deduced. The height-integrated current was 0.11 A/m flowing at an azimuth angle of 276 deg. The neutral winds were strong, exhibited substantial altitude variation in the east-west component, and were predominantly southward.
Bering Edgar A.
Mozer Forrest S.
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