Simultaneous satellite and all-sky imager observations of polar cap phenomena

T. Obara; T. Mukai; H. Hayakawa; A. Matsuoka; K. Tsuruda; A. Nishida; K. Fukui; J. V. Rodriguez; C. E. Valladares

doi:10.1016/S0273-1177(98)00182-3

Simultaneous satellite and all-sky imager observations of polar cap phenomena

T. Obara, T. Mukai, H. Hayakawa, A. Matsuoka, K. Tsuruda, A. Nishida, K. Fukui, J. V. Rodriguez, C. E. Valladares

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

In order to understand the processes of formation and motion of sun-aligned polar cap arcs as well as patches, we have analyzed simultaneous observational data from Akebono (EXOS D) satellite and the all-sky imager at Qaanaaq, Greenland. The results demonstrate the correspondence between the localized electron precipitation signatures observed from Akebono and the sun-aligned arcs seen from the all-sky imager at Qaanaaq, and confirm that sun-aligned arc correspond to divE<O. The average energy of precipitating electrons is in the range from 100eV to 200eV. The magnetosheath/mantle is likely the source region of the precipitating electrons. For patches, most drifted anti-sunward, but some ceased to drift within the field of view of the all-sky imager. Comparison between patch movement and the plasma convection velocity demonstrates a general consistency between them.

Original language	English
Pages (from-to)	1337-1340
Number of pages	4
Journal	Advances in Space Research
Volume	22
Issue number	9
DOIs	https://doi.org/10.1016/S0273-1177(98)00182-3
Publication status	Published - 1998
Externally published	Yes

ASJC Scopus subject areas

Aerospace Engineering
Astronomy and Astrophysics
Geophysics
Atmospheric Science
Space and Planetary Science
Earth and Planetary Sciences(all)

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title = "Simultaneous satellite and all-sky imager observations of polar cap phenomena",

abstract = "In order to understand the processes of formation and motion of sun-aligned polar cap arcs as well as patches, we have analyzed simultaneous observational data from Akebono (EXOS D) satellite and the all-sky imager at Qaanaaq, Greenland. The results demonstrate the correspondence between the localized electron precipitation signatures observed from Akebono and the sun-aligned arcs seen from the all-sky imager at Qaanaaq, and confirm that sun-aligned arc correspond to divE<O. The average energy of precipitating electrons is in the range from 100eV to 200eV. The magnetosheath/mantle is likely the source region of the precipitating electrons. For patches, most drifted anti-sunward, but some ceased to drift within the field of view of the all-sky imager. Comparison between patch movement and the plasma convection velocity demonstrates a general consistency between them.",

author = "T. Obara and T. Mukai and H. Hayakawa and A. Matsuoka and K. Tsuruda and A. Nishida and K. Fukui and Rodriguez, {J. V.} and Valladares, {C. E.}",

year = "1998",

doi = "10.1016/S0273-1177(98)00182-3",

language = "English",

volume = "22",

pages = "1337--1340",

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issn = "0273-1177",

publisher = "Elsevier Limited",

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TY - JOUR

T1 - Simultaneous satellite and all-sky imager observations of polar cap phenomena

AU - Obara, T.

AU - Mukai, T.

AU - Hayakawa, H.

AU - Matsuoka, A.

AU - Tsuruda, K.

AU - Nishida, A.

AU - Fukui, K.

AU - Rodriguez, J. V.

AU - Valladares, C. E.

PY - 1998

Y1 - 1998

N2 - In order to understand the processes of formation and motion of sun-aligned polar cap arcs as well as patches, we have analyzed simultaneous observational data from Akebono (EXOS D) satellite and the all-sky imager at Qaanaaq, Greenland. The results demonstrate the correspondence between the localized electron precipitation signatures observed from Akebono and the sun-aligned arcs seen from the all-sky imager at Qaanaaq, and confirm that sun-aligned arc correspond to divE<O. The average energy of precipitating electrons is in the range from 100eV to 200eV. The magnetosheath/mantle is likely the source region of the precipitating electrons. For patches, most drifted anti-sunward, but some ceased to drift within the field of view of the all-sky imager. Comparison between patch movement and the plasma convection velocity demonstrates a general consistency between them.

AB - In order to understand the processes of formation and motion of sun-aligned polar cap arcs as well as patches, we have analyzed simultaneous observational data from Akebono (EXOS D) satellite and the all-sky imager at Qaanaaq, Greenland. The results demonstrate the correspondence between the localized electron precipitation signatures observed from Akebono and the sun-aligned arcs seen from the all-sky imager at Qaanaaq, and confirm that sun-aligned arc correspond to divE<O. The average energy of precipitating electrons is in the range from 100eV to 200eV. The magnetosheath/mantle is likely the source region of the precipitating electrons. For patches, most drifted anti-sunward, but some ceased to drift within the field of view of the all-sky imager. Comparison between patch movement and the plasma convection velocity demonstrates a general consistency between them.

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JO - Life sciences and space research

JF - Life sciences and space research

SN - 0273-1177

IS - 9

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