High-speed stereoscopy of aurora
We performed 100 fps stereoscopic imaging of aurora for the first time. Two identical sCMOS cameras equipped with narrow field-of-view lenses (15° by 15°) were directed at magnetic zenith with the north–south base distance of 8.1 km. Here we show the best example that a rapidly pulsating diffuse...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2016-01-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/34/41/2016/angeo-34-41-2016.pdf |
| Summary: | We performed 100 fps stereoscopic imaging of aurora for the first time. Two
identical sCMOS cameras equipped with narrow field-of-view lenses (15° by
15°) were directed at magnetic zenith with the north–south base distance
of 8.1 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 85–95 km
and > 100 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., 10 km increase over 5 s)
for pulsating patches and is fast (e.g., 10 km increase within 0.5 s) for
streaming arcs. |
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| ISSN: | 0992-7689 1432-0576 |