A measurement of perpendicular current density in an aurora
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-...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19760027777 2023-05-15T17:04:13+02:00 A measurement of perpendicular current density in an aurora Bering, E. A. Mozer, F. S. Unclassified, Unlimited, Publicly available Oct 1, 1975 http://ntrs.nasa.gov/search.jsp?R=19760027777 unknown http://ntrs.nasa.gov/search.jsp?R=19760027777 Accession ID: 76A10743 Copyright Other Sources 46 Journal of Geophysical Research; 80; Oct. 1 1975 ftnasantrs 2012-02-15T12:38:54Z 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. Other/Unknown Material Kiruna NASA Technical Reports Server (NTRS) Esrange ENVELOPE(21.117,21.117,67.883,67.883) Kiruna Langmuir ENVELOPE(-67.150,-67.150,-66.967,-66.967) |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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language |
unknown |
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46 |
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46 Bering, E. A. Mozer, F. S. A measurement of perpendicular current density in an aurora |
topic_facet |
46 |
description |
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. |
format |
Other/Unknown Material |
author |
Bering, E. A. Mozer, F. S. |
author_facet |
Bering, E. A. Mozer, F. S. |
author_sort |
Bering, E. A. |
title |
A measurement of perpendicular current density in an aurora |
title_short |
A measurement of perpendicular current density in an aurora |
title_full |
A measurement of perpendicular current density in an aurora |
title_fullStr |
A measurement of perpendicular current density in an aurora |
title_full_unstemmed |
A measurement of perpendicular current density in an aurora |
title_sort |
measurement of perpendicular current density in an aurora |
publishDate |
1975 |
url |
http://ntrs.nasa.gov/search.jsp?R=19760027777 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(21.117,21.117,67.883,67.883) ENVELOPE(-67.150,-67.150,-66.967,-66.967) |
geographic |
Esrange Kiruna Langmuir |
geographic_facet |
Esrange Kiruna Langmuir |
genre |
Kiruna |
genre_facet |
Kiruna |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19760027777 Accession ID: 76A10743 |
op_rights |
Copyright |
_version_ |
1766058265386418176 |