@article{5fab00db87ac42fb94cd087ad2bbb18e,
title = "Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite-PWING Observations",
abstract = "Rapid (<1 s) intensity modulation of pulsating auroras is caused by successive chorus elements as a response to wave-particle interactions in the magnetosphere. Here we found that a pulsating auroral patch responds to the time spacing for successive chorus elements and possibly to chorus subpacket structures with a time scale of tens of milliseconds. These responses were identified from coordinated Arase satellite and ground (Gakona, Alaska) observations with a high-speed auroral imager (100 Hz). The temporal variations of auroral intensity in a few-hertz frequency range exhibited a spatial concentration at the lower-latitude edge of the auroral patch. The spatial evolution of the auroral patch showed repeated expansion/contraction with tens of kilometer scales in the ionosphere, which could be spatial behaviors in the wave-particle interactions. These observations indicate that chorus elements evolve coherently within the auroral patch, which is approximately 900 km in the radial and longitudinal directions at the magnetic equator.",
keywords = "Arase satellite, discrete chorus element, ground-based observation network, pulsating aurora, wave-particle interaction",
author = "M. Ozaki and K. Shiokawa and Y. Miyoshi and K. Hosokawa and S. Oyama and S. Yagitani and Y. Kasahara and Y. Kasaba and S. Matsuda and R. Kataoka and Y. Ebihara and Y. Ogawa and Y. Otsuka and S. Kurita and Moore, {R. C.} and Tanaka, {Y. M.} and M. Nos{\'e} and T. Nagatsuma and M. Connors and N. Nishitani and Y. Katoh and M. Hikishima and A. Kumamoto and F. Tsuchiya and A. Kadokura and T. Nishiyama and T. Inoue and K. Imamura and A. Matsuoka and I. Shinohara",
note = "Funding Information: The present work was supported by JSPS KAKENHI (Grants JP14J02108, JP15H05747, JP15H05815, JP16H06286, JP16H04056, JP17K05668, JP17H06140, JP17K06456, and JP18H03727) and the Kanazawa University SAKIGAKE project. This study was also supported by the JSPS Bilateral Open Partnership Joint Research Projects. The authors are grateful to Y. Hamaguchi, Y. Yamamoto, T. Adachi, and Y. Kato of ISEE, Nagoya University, for their careful management of the PWING ground observations. The operation of the EMCCD camera at Gakona was supported by the University of Alaska Fairbanks. The EMCCD images and PWE data were provided by the ERG Science Center operated by ISAS/JAXA and ISEE/Nagoya University (https://ergsc. isee.nagoya-u.ac.jp/index.shtml.en). The Arase satellite data will be publicly available via the ERG Science Center on a project-agreed schedule. The database construction of the PWING ground-based observational data is partly supported by the IUGONET (Interuniversity Upper atmosphere Global Observation NETwork) project (http:// www.iugonet.org/). This research is also supported by the International Space Science Institute-Beijing (ISSI-BJ) International team program. The present work used the PWE waveform (L1{\textquoteright} v06) and the MGF (L2 v01.00) data. The Dst index was provided by the WDC for Geomagnetism, Kyoto. Funding Information: The present work was supported by JSPS KAKENHI (Grants JP14J02108, JP15H05747, JP15H05815, JP16H06286, JP16H04056, JP17K05668, JP17H06140, JP17K06456, and JP18H03727) and the Kanazawa University SAKIGAKE project. This study was also supported by the JSPS Bilateral Open Partnership Joint Research Projects. The authors are grateful to Y. Hamaguchi, Y. Yamamoto, T. Adachi, and Y. Kato of ISEE, Nagoya University, for their careful management of the PWING ground observations. The operation of the EMCCD camera at Gakona was supported by the University of Alaska Fairbanks. The EMCCD images and PWE data were provided by the ERG Science Center operated by ISAS/JAXA and ISEE/Nagoya University (https://ergsc.isee.nagoya-u.ac.jp/index.shtml.en). The Arase satellite data will be publicly available via the ERG Science Center on a project-agreed schedule. The database construction of the PWING ground-based observational data is partly supported by the IUGONET (Inter-university Upper atmosphere Global Observation NETwork) project (http://www.iugonet.org/). This research is also supported by the International Space Science Institute-Beijing (ISSI-BJ) International team program. The present work used the PWE waveform (L1? v06) and the MGF (L2 v01.00) data. The Dst index was provided by the WDC for Geomagnetism, Kyoto. Publisher Copyright: {\textcopyright}2018. American Geophysical Union. All Rights Reserved.",
year = "2018",
month = nov,
day = "28",
doi = "10.1029/2018GL079812",
language = "English",
volume = "45",
pages = "12,125--12,134",
number = "22",
}