Impulsive solar wind-driven emission from Uranus
Several days prior to the Voyager spacecraft encounter with Uranus, the plasma wave and radio astronomy receivers detected extraordinarily narrowband bursty signals, the first indication of any radio emission from the planet. The characteristics of these signals were so unusual that their identity a...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19890051532 2023-05-15T17:39:16+02:00 Impulsive solar wind-driven emission from Uranus Desch, M. D. Kaiser, M. L. Kurth, W. S. Unclassified, Unlimited, Publicly available May 1, 1989 http://ntrs.nasa.gov/search.jsp?R=19890051532 unknown http://ntrs.nasa.gov/search.jsp?R=19890051532 Accession ID: 89A38903 Copyright Other Sources 91 Journal of Geophysical Research; 94; 5255-526 1989 ftnasantrs 2012-02-15T18:03:25Z Several days prior to the Voyager spacecraft encounter with Uranus, the plasma wave and radio astronomy receivers detected extraordinarily narrowband bursty signals, the first indication of any radio emission from the planet. The characteristics of these signals were so unusual that their identity as a natural planetary emission was questioned at first. Subsequent analysis has shown, however, that the n bursts are modulated at the 17.24-hour Uranus rotation period and are, therefore, planetary in origin. It is shown, in addition, that the typical bandwidth and time scale for the bursts are about 5 kHz and 250 ms, respectively. The phase of the rotation modulation suggests a probable source for these events in the vicinity of the north (weak) magnetic pole. The waves are right-hand polarized and are therefore emitted in the extraordinary magnetoionic mode if the emission in fact originates above the north magnetic pole. Other/Unknown Material North Magnetic Pole NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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91 |
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91 Desch, M. D. Kaiser, M. L. Kurth, W. S. Impulsive solar wind-driven emission from Uranus |
topic_facet |
91 |
description |
Several days prior to the Voyager spacecraft encounter with Uranus, the plasma wave and radio astronomy receivers detected extraordinarily narrowband bursty signals, the first indication of any radio emission from the planet. The characteristics of these signals were so unusual that their identity as a natural planetary emission was questioned at first. Subsequent analysis has shown, however, that the n bursts are modulated at the 17.24-hour Uranus rotation period and are, therefore, planetary in origin. It is shown, in addition, that the typical bandwidth and time scale for the bursts are about 5 kHz and 250 ms, respectively. The phase of the rotation modulation suggests a probable source for these events in the vicinity of the north (weak) magnetic pole. The waves are right-hand polarized and are therefore emitted in the extraordinary magnetoionic mode if the emission in fact originates above the north magnetic pole. |
format |
Other/Unknown Material |
author |
Desch, M. D. Kaiser, M. L. Kurth, W. S. |
author_facet |
Desch, M. D. Kaiser, M. L. Kurth, W. S. |
author_sort |
Desch, M. D. |
title |
Impulsive solar wind-driven emission from Uranus |
title_short |
Impulsive solar wind-driven emission from Uranus |
title_full |
Impulsive solar wind-driven emission from Uranus |
title_fullStr |
Impulsive solar wind-driven emission from Uranus |
title_full_unstemmed |
Impulsive solar wind-driven emission from Uranus |
title_sort |
impulsive solar wind-driven emission from uranus |
publishDate |
1989 |
url |
http://ntrs.nasa.gov/search.jsp?R=19890051532 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
North Magnetic Pole |
genre_facet |
North Magnetic Pole |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19890051532 Accession ID: 89A38903 |
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Copyright |
_version_ |
1766140031736479744 |