Observations of GPS scintillation during an isolated auroral substorm
Abstract This paper reports simultaneous observations of ionospheric scintillation during an auroral substorm that were made using an all-sky full-color digital single-lens reflex (DSLR) camera (ASC) and a Global Positioning System (GPS) ionospheric scintillation and total electron content monitor (...
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BioMed Central Ltd.
2014
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ftbiomed:oai:biomedcentral.com:2197-4284-1-16 2023-05-15T18:34:41+02:00 Observations of GPS scintillation during an isolated auroral substorm Hosokawa, Keisuke Otsuka, Yuichi Ogawa, Yasunobu Tsugawa, Takuya 2014-08-04 http://www.progearthplanetsci.com/content/1/1/16 en eng BioMed Central Ltd. http://www.progearthplanetsci.com/content/1/1/16 Copyright 2014 Hosokawa et al.; licensee Springer. Auroral ionosphere GPS scintillation Auroral substorm Ionospheric density irregularities Research 2014 ftbiomed 2014-08-17T00:37:51Z Abstract This paper reports simultaneous observations of ionospheric scintillation during an auroral substorm that were made using an all-sky full-color digital single-lens reflex (DSLR) camera (ASC) and a Global Positioning System (GPS) ionospheric scintillation and total electron content monitor (GISTM) in Tromsø (69.60 N, 19.20 E), Norway. On the night of November 19, 2009, a small substorm occurred in northern Scandinavia. The ASC captured its temporal evolution from the beginning of the growth phase to the end of the recovery phase. The amplitude scintillation, as monitored by the S 4 index from the GISTM, did not increase in any substorm phase. By contrast, phase scintillation, as measured by the σ φ index, occurred when discrete auroral arcs appeared on the GPS signal path. In particular, the phase scintillation was significantly enhanced for a few minutes immediately after the onset of the expansion phase. During this period, bright and discrete auroral forms covered the entire sky, which implies that structured precipitation on the scale of a few kilometers to a few tens of kilometers dominated the electron density distribution in the E region. Such inhomogeneous ionization structures probably produced significant changes in the refractive index and eventually resulted in the enhancement of the phase scintillation. Other/Unknown Material Tromsø BioMed Central Norway Tromsø |
institution |
Open Polar |
collection |
BioMed Central |
op_collection_id |
ftbiomed |
language |
English |
topic |
Auroral ionosphere GPS scintillation Auroral substorm Ionospheric density irregularities |
spellingShingle |
Auroral ionosphere GPS scintillation Auroral substorm Ionospheric density irregularities Hosokawa, Keisuke Otsuka, Yuichi Ogawa, Yasunobu Tsugawa, Takuya Observations of GPS scintillation during an isolated auroral substorm |
topic_facet |
Auroral ionosphere GPS scintillation Auroral substorm Ionospheric density irregularities |
description |
Abstract This paper reports simultaneous observations of ionospheric scintillation during an auroral substorm that were made using an all-sky full-color digital single-lens reflex (DSLR) camera (ASC) and a Global Positioning System (GPS) ionospheric scintillation and total electron content monitor (GISTM) in Tromsø (69.60 N, 19.20 E), Norway. On the night of November 19, 2009, a small substorm occurred in northern Scandinavia. The ASC captured its temporal evolution from the beginning of the growth phase to the end of the recovery phase. The amplitude scintillation, as monitored by the S 4 index from the GISTM, did not increase in any substorm phase. By contrast, phase scintillation, as measured by the σ φ index, occurred when discrete auroral arcs appeared on the GPS signal path. In particular, the phase scintillation was significantly enhanced for a few minutes immediately after the onset of the expansion phase. During this period, bright and discrete auroral forms covered the entire sky, which implies that structured precipitation on the scale of a few kilometers to a few tens of kilometers dominated the electron density distribution in the E region. Such inhomogeneous ionization structures probably produced significant changes in the refractive index and eventually resulted in the enhancement of the phase scintillation. |
format |
Other/Unknown Material |
author |
Hosokawa, Keisuke Otsuka, Yuichi Ogawa, Yasunobu Tsugawa, Takuya |
author_facet |
Hosokawa, Keisuke Otsuka, Yuichi Ogawa, Yasunobu Tsugawa, Takuya |
author_sort |
Hosokawa, Keisuke |
title |
Observations of GPS scintillation during an isolated auroral substorm |
title_short |
Observations of GPS scintillation during an isolated auroral substorm |
title_full |
Observations of GPS scintillation during an isolated auroral substorm |
title_fullStr |
Observations of GPS scintillation during an isolated auroral substorm |
title_full_unstemmed |
Observations of GPS scintillation during an isolated auroral substorm |
title_sort |
observations of gps scintillation during an isolated auroral substorm |
publisher |
BioMed Central Ltd. |
publishDate |
2014 |
url |
http://www.progearthplanetsci.com/content/1/1/16 |
geographic |
Norway Tromsø |
geographic_facet |
Norway Tromsø |
genre |
Tromsø |
genre_facet |
Tromsø |
op_relation |
http://www.progearthplanetsci.com/content/1/1/16 |
op_rights |
Copyright 2014 Hosokawa et al.; licensee Springer. |
_version_ |
1766219548673966080 |