On the relationship between morning sector irregular magnetic pulsations and field aligned currents
For three magnetically disturbed days in early 1980, data from south polar masses of the Magsat satellite are compared with data from search coil magnetometer, riometer, and photometer instrumentation at Siple, Antarctica. It is found that during each Magsat polar pass in the morning sector, the lev...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19840043375 2023-05-15T13:40:59+02:00 On the relationship between morning sector irregular magnetic pulsations and field aligned currents Engebretson, M. J. Cahill, L. J., Jr. Potemra, T. A. Zanetti, L. J. Arnoldy, R. L. Mende, S. B. Rosenberg, T. J. Unclassified, Unlimited, Publicly available Mar 1, 1984 http://ntrs.nasa.gov/search.jsp?R=19840043375 unknown http://ntrs.nasa.gov/search.jsp?R=19840043375 Accession ID: 84A26162 Copyright Other Sources 46 Journal of Geophysical Research; 89; 1602-161 1984 ftnasantrs 2012-02-15T15:51:24Z For three magnetically disturbed days in early 1980, data from south polar masses of the Magsat satellite are compared with data from search coil magnetometer, riometer, and photometer instrumentation at Siple, Antarctica. It is found that during each Magsat polar pass in the morning sector, the level of Pi 1 activity correlates well with the intensities of three-dimensional current systems. Fine structure is often observed in the field-aligned currents during periods of intense Pi activity. Among the Birkeland currents are 2-s to 10-s (16-80 km) structured perturbations; these are evident in the transverse components of the field and are thought to indicate filamentary currents. Pi 1 amplitudes are found to be considerably larger when region 2 Birkeland currents are overhead than when they are not. In one case, detailed features are identified in the high-resolution Magsat magnetic field data that may be current fluctuations related to asymmetric Pi 1. Other/Unknown Material Antarc* Antarctica NASA Technical Reports Server (NTRS) Birkeland ENVELOPE(16.587,16.587,68.594,68.594) Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
46 |
spellingShingle |
46 Engebretson, M. J. Cahill, L. J., Jr. Potemra, T. A. Zanetti, L. J. Arnoldy, R. L. Mende, S. B. Rosenberg, T. J. On the relationship between morning sector irregular magnetic pulsations and field aligned currents |
topic_facet |
46 |
description |
For three magnetically disturbed days in early 1980, data from south polar masses of the Magsat satellite are compared with data from search coil magnetometer, riometer, and photometer instrumentation at Siple, Antarctica. It is found that during each Magsat polar pass in the morning sector, the level of Pi 1 activity correlates well with the intensities of three-dimensional current systems. Fine structure is often observed in the field-aligned currents during periods of intense Pi activity. Among the Birkeland currents are 2-s to 10-s (16-80 km) structured perturbations; these are evident in the transverse components of the field and are thought to indicate filamentary currents. Pi 1 amplitudes are found to be considerably larger when region 2 Birkeland currents are overhead than when they are not. In one case, detailed features are identified in the high-resolution Magsat magnetic field data that may be current fluctuations related to asymmetric Pi 1. |
format |
Other/Unknown Material |
author |
Engebretson, M. J. Cahill, L. J., Jr. Potemra, T. A. Zanetti, L. J. Arnoldy, R. L. Mende, S. B. Rosenberg, T. J. |
author_facet |
Engebretson, M. J. Cahill, L. J., Jr. Potemra, T. A. Zanetti, L. J. Arnoldy, R. L. Mende, S. B. Rosenberg, T. J. |
author_sort |
Engebretson, M. J. |
title |
On the relationship between morning sector irregular magnetic pulsations and field aligned currents |
title_short |
On the relationship between morning sector irregular magnetic pulsations and field aligned currents |
title_full |
On the relationship between morning sector irregular magnetic pulsations and field aligned currents |
title_fullStr |
On the relationship between morning sector irregular magnetic pulsations and field aligned currents |
title_full_unstemmed |
On the relationship between morning sector irregular magnetic pulsations and field aligned currents |
title_sort |
on the relationship between morning sector irregular magnetic pulsations and field aligned currents |
publishDate |
1984 |
url |
http://ntrs.nasa.gov/search.jsp?R=19840043375 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(16.587,16.587,68.594,68.594) ENVELOPE(-83.917,-83.917,-75.917,-75.917) |
geographic |
Birkeland Siple |
geographic_facet |
Birkeland Siple |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19840043375 Accession ID: 84A26162 |
op_rights |
Copyright |
_version_ |
1766144106145251328 |