Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval

Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval

<p>Finding the position of the polar boundary of the outer electron radiation belt, relative to the position of the auroral oval, is a long-standing problem. Here we analyze it using the data of the METEOR-M1 auroral satellite for the period from 11 November 2009 to 27 March 2010. The geom...

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Main Authors: M. O. Riazanteseva, E. E. Antonova, M. V. Stepanova, B. V. Marjin, I. A. Rubinshtein, V. O. Barinova, N. V. Sotnikov
Format: Article
Language:English
Published: Copernicus Publications 2018-08-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/36/1131/2018/angeo-36-1131-2018.pdf
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spelling doaj-d4660ac3e35245bba0c2bb545473b8612020-11-24T22:12:29ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762018-08-01361131114010.5194/angeo-36-1131-2018Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral ovalM. O. Riazanteseva0E. E. Antonova1E. E. Antonova2M. V. Stepanova3B. V. Marjin4B. V. Marjin5I. A. Rubinshtein6V. O. Barinova7N. V. Sotnikov8Space Research Institute (IKI) Russian Academy of Science, Moscow, RussiaSpace Research Institute (IKI) Russian Academy of Science, Moscow, RussiaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, RussiaPhysics Department, Universidad de Santiago de Chile (USACH), Santiago, ChileSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, RussiadeceasedSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, RussiaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, RussiaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia<p>Finding the position of the polar boundary of the outer electron radiation belt, relative to the position of the auroral oval, is a long-standing problem. Here we analyze it using the data of the METEOR-M1 auroral satellite for the period from 11 November 2009 to 27 March 2010. The geomagnetic conditions during the analyzed period were comparatively quiet. METEOR-M1 has a polar solar-synchronous circular orbit with an altitude of  ≈ 832&thinsp;km, a period of 101.3&thinsp;min, and an inclination of 98°. We analyze flux observations of auroral electrons with energies between 0.03 and 16&thinsp;keV, and electrons with energies  &gt; 100&thinsp;keV, measured simultaneously by the GGAK-M set of instruments, composed of semiconductors, scintillator detectors, and electrostatic analyzers. We assume that in the absence of geomagnetic storms the polar boundary of the outer radiation belt can be identified as a decrease in the count rate of precipitating energetic electrons to the background level. It was found that this boundary can be located both inside the auroral oval or equatorward of the equatorial boundary of the auroral precipitation. It was also found that for slightly disturbed geomagnetic conditions the polar boundary of the outer radiation belt is almost always located inside the auroral oval. We observe that the difference between the position of the polar boundary of the outer radiation belt and the position of the equatorial boundary of the auroral precipitation depend on the AE and PC indices of geomagnetic activity. The implications of these results in the analysis of the formation of the outer radiation belt are discussed.</p>https://www.ann-geophys.net/36/1131/2018/angeo-36-1131-2018.pdf
collection DOAJ
language English
format Article
sources DOAJ
author M. O. Riazanteseva
E. E. Antonova
E. E. Antonova
M. V. Stepanova
B. V. Marjin
B. V. Marjin
I. A. Rubinshtein
V. O. Barinova
N. V. Sotnikov
spellingShingle M. O. Riazanteseva
E. E. Antonova
E. E. Antonova
M. V. Stepanova
B. V. Marjin
B. V. Marjin
I. A. Rubinshtein
V. O. Barinova
N. V. Sotnikov
Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval
Annales Geophysicae
author_facet M. O. Riazanteseva
E. E. Antonova
E. E. Antonova
M. V. Stepanova
B. V. Marjin
B. V. Marjin
I. A. Rubinshtein
V. O. Barinova
N. V. Sotnikov
author_sort M. O. Riazanteseva
title Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval
title_short Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval
title_full Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval
title_fullStr Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval
title_full_unstemmed Relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval
title_sort relative positions of the polar boundary of the outer electron radiation belt and the equatorial boundary of the auroral oval
publisher Copernicus Publications
series Annales Geophysicae
issn 0992-7689
1432-0576
publishDate 2018-08-01
description <p>Finding the position of the polar boundary of the outer electron radiation belt, relative to the position of the auroral oval, is a long-standing problem. Here we analyze it using the data of the METEOR-M1 auroral satellite for the period from 11 November 2009 to 27 March 2010. The geomagnetic conditions during the analyzed period were comparatively quiet. METEOR-M1 has a polar solar-synchronous circular orbit with an altitude of  ≈ 832&thinsp;km, a period of 101.3&thinsp;min, and an inclination of 98°. We analyze flux observations of auroral electrons with energies between 0.03 and 16&thinsp;keV, and electrons with energies  &gt; 100&thinsp;keV, measured simultaneously by the GGAK-M set of instruments, composed of semiconductors, scintillator detectors, and electrostatic analyzers. We assume that in the absence of geomagnetic storms the polar boundary of the outer radiation belt can be identified as a decrease in the count rate of precipitating energetic electrons to the background level. It was found that this boundary can be located both inside the auroral oval or equatorward of the equatorial boundary of the auroral precipitation. It was also found that for slightly disturbed geomagnetic conditions the polar boundary of the outer radiation belt is almost always located inside the auroral oval. We observe that the difference between the position of the polar boundary of the outer radiation belt and the position of the equatorial boundary of the auroral precipitation depend on the AE and PC indices of geomagnetic activity. The implications of these results in the analysis of the formation of the outer radiation belt are discussed.</p>
url https://www.ann-geophys.net/36/1131/2018/angeo-36-1131-2018.pdf
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