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High-speed stereoscopy of aurora
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2016 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 34, no 1, 41-44 p.Article in journal (Refereed) PublishedText
Abstract [en]

We performed 100aEuro-fps stereoscopic imaging of aurora for the first time. Two identical sCMOS cameras equipped with narrow field-of-view lenses (15A degrees by 15A degrees) were directed at magnetic zenith with the north-south base distance of 8.1aEuro-km. Here we show the best example that a rapidly pulsating diffuse patch and a streaming discrete arc were observed at the same time with different parallaxes, and the emission altitudes were estimated as 85-95aEuro-km and > aEuro-100aEuro-km, respectively. The estimated emission altitudes are consistent with those estimated in previous studies, and it is suggested that high-speed stereoscopy is useful to directly measure the emission altitudes of various types of rapidly varying aurora. It is also found that variation of emission altitude is gradual (e.g., 10aEuro-km increase over 5aEuro-s) for pulsating patches and is fast (e.g., 10aEuro-km increase within 0.5aEuro-s) for streaming arcs.

Place, publisher, year, edition, pages
Copernicus GmbH , 2016. Vol. 34, no 1, 41-44 p.
Keyword [en]
Ionosphere, auroral ionosphere
National Category
Geophysics Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-186019DOI: 10.5194/angeo-34-41-2016ISI: 000373596900004ScopusID: 2-s2.0-84957309502OAI: oai:DiVA.org:kth-186019DiVA: diva2:926564
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QC 20160509

Available from: 2016-05-09 Created: 2016-04-29 Last updated: 2016-05-09Bibliographically approved

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Dahlgren, Hanna
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Space and Plasma Physics
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