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A New Solar Imaging System for Observing High-Speed Eruptions: Solar Dynamics Doppler Imager (SDDI)

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Abstract

A new solar imaging system was installed at Hida Observatory to observe the dynamics of flares and filament eruptions. The system (Solar Dynamics Doppler Imager; SDDI) takes full-disk solar images with a field of view of \(2520~\mbox{arcsec} \times 2520~\mbox{arcsec}\) at multiple wavelengths around the \(\mathrm{H}\alpha\) line at 6562 Å. Regular operation was started in May 2016, in which images at 73 wavelength positions spanning from \(\mathrm{H}\alpha -9~\mathring{\mathrm{A}}\) to \(\mathrm{H}\alpha +9~\mathring{\mathrm{A}}\) are obtained every 15 seconds. The large dynamic range of the line-of-sight velocity measurements (\({\pm}\,400~\mbox{km}\,\mbox{s}^{-1}\)) allows us to determine the real motions of erupting filaments in 3D space. It is expected that SDDI provides unprecedented datasets to study the relation between the kinematics of filament eruptions and coronal mass ejections (CME), and to contribute to the real-time prediction of the occurrence of CMEs that cause a significant impact on the space environment of the Earth.

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Acknowledgements

The authors are grateful to the staff of Hida Observatory for supporting the instrument development and daily observations. This work was supported by MEXT/JSPS KAKENHI Grant Number JP15H05814, Project for Solar-Terrestrial Environment Prediction (PSTEP).

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Authors and Affiliations

  1. Kwasan and Hida Observatories, Kyoto University, Kyoto, Japan

    Kiyoshi Ichimoto, Takako T. Ishii, Kenichi Otsuji, Goichi Kimura, Yoshikazu Nakatani, Naoki Kaneda, Shin’Ichi Nagata, Satoru UeNo, Kumi Hirose & Denis Cabezas

  2. National Astronomical Observatory of Japan, Mitaka, Japan

    Kiyoshi Ichimoto & Satoshi Morita

Authors
  1. Kiyoshi Ichimoto
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  2. Takako T. Ishii
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  3. Kenichi Otsuji
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  4. Goichi Kimura
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  5. Yoshikazu Nakatani
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  6. Naoki Kaneda
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  7. Shin’Ichi Nagata
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  8. Satoru UeNo
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  9. Kumi Hirose
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  10. Denis Cabezas
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  11. Satoshi Morita
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Correspondence to Kiyoshi Ichimoto.

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Earth-affecting Solar Transients

Guest Editors: Jie Zhang, Xochitl Blanco-Cano, Nariaki Nitta, and Nandita Srivastava

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Ichimoto, K., Ishii, T.T., Otsuji, K. et al. A New Solar Imaging System for Observing High-Speed Eruptions: Solar Dynamics Doppler Imager (SDDI). Sol Phys 292, 63 (2017). https://doi.org/10.1007/s11207-017-1082-7

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