S. Nagata

The Sunrise Chromospheric Infrared Spectro-Polarimeter SCIP: An Instrument for SUNRISE III

Yukio Katsukawa, J. C. del Toro Iniesta, S. K. Solanki, Masahito Kubo et autres

Abstract The Sunrise balloon-borne solar observatory is equipped with a one-meter aperture optical telescope, offering a unique platform for uninterrupted seeing-free observations across ultraviolet, visible, and infrared wavelengths from altitudes higher than 33 km. For the third flight of the upgraded Sunrise …

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Polarimetric observations of the Sun in He I 1083 nm line with LiNbO3 Fabry-Perot filtergraph and rotating waveplate

Y. Suematsu, Tomoya Iju, Kazuya Shinoda, M. Hagino et autres

In order to derive solar magnetic fields, a 2D spectro-polarimeter working in the near-infrared wavelength range is under development. A voltage-wavelength-tunable lithium-niobate (LiNbO3) etalon filtergraph is used as the 2D spectrometer. A rotating waveplate for modulating the polarization is used, which has …

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Infrared Imaging Spectropolarimetry of the Solar Chromosphere and Corona with DKIST

Ayumi Asai, Yukio Katsukawa, Yusuke Kawabata, Tetsu Anan et autres

Whitepaper #020 in the Decadal Survey for Solar and Space Physics (Heliophysics) 2024-2033. Main topics: space weather applications; basic research. Additional topics: space weather research/applications/operations pipeline; ground-based missions/projects; solar physics.

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Polarimetric calibration of a spectropolarimeter instrument with high precision: Sunrise chromospheric infrared spectropolarimeter (SCIP) for the sunrise iii balloon telescope

Yusuke Kawabata, Yukio Katsukawa, Masahito Kubo, Tetsu Anan et autres

The Sunrise chromospheric infrared spectropolarimeter (SCIP) installed in the international balloon experiment sunrise iii will perform spectropolarimetric observations in the near-infrared band to measure solar photospheric and chromospheric magnetic fields simultaneously. The main components of SCIP for polarization measurements are a rotating …

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Polarization calibration of the Tandem Etalon Magnetograph of the Solar Magnetic Activity Research Telescope at Hida Observatory

Daiki Yamasaki, S. Nagata, Kiyoshi Ichimoto

Abstract The Tandem Etalon Magnetograph (TEM) is one of the instruments of the Solar Magnetic Activity Research Telescope of Hida Observatory. The TEM is a partial disk (320″ × 240″) filter magnetograph which scans the wavelength around a Fe i line at …

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Polarization calibration of the Tandem Etalon Magnetograph of the Solar Magnetic Activity Research Telescope at Hida Observatory

Daiki Yamasaki, S. Nagata, Kiyoshi Ichimoto

The Tandem Etalon Magnetograph (TEM) is one of the instruments of the Solar Magnetic Activity Research Telescope of Hida Observatory. The TEM is a partial disk (320" x240") filter magnetograph which scans the wavelength around a Fe I line at 6303 angstrom …

Effects of air chamber and curtain wall geometries on energy conversion performance in a fixed oscillating water column-type wave energy converter

Tengen Murakami, Yasutaka Imai, S. Nagata, Manabu TAKAO

Abstract An oscillating water column-type wave energy extractor is composed of an air chamber, an air turbine and a generator. The energy conversion process is compounded of the primary conversion in an air chamber and the secondary conversion of an air turbine. …

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国際大気球太陽観測実験 SUNRISE-3

行雄 勝川, J. C. del Toro Iniesta, S. K. Solanki, 雅仁 久保 et autres

Balloon Symposium 2017 (November 9-10, 2017. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan

Use of Deep Learning Algorithm to Detect Road Damage and Closures After the 2016 Kumamoto Japan Earthquake

Yoshihisa Maruyama, Riku SEZAKI, S. Nagata

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Sunrise Chromospheric Infrared SpectroPolarimeter (SCIP) for sunrise III: system design and capability

Yukio Katsukawa, J. C. del Toro Iniesta, S. K. Solanki, Masahito Kubo et autres

The Sunrise balloon-borne solar observatory carries a 1 m aperture optical telescope and provides us a unique platform to conduct continuous seeing-free observations at UV-visible-IR wavelengths from an altitude of higher than 35 km. For the next flight planned for 2022, the …

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The Solar-C_EUVST mission: the latest status

Toshifumi Shimizu, Shinsuke Imada, Tomoko Kawate, Y. Suematsu et autres

Solar-C (EUVST) is the next Japanese solar physics mission to be developed with significant contributions from US and European countries. The mission carries an EUV imaging spectrometer with slit-jaw imaging system called EUVST (EUV High-Throughput Spectroscopic Telescope) as the mission payload, to …

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Effect of hub-to-tip ratio on the performance of bi-directional impulse turbine with flow collector for tidal energy conversion

Yoichi KINOUE, N. Shiomi, Manabu TAKAO, Tengen Murakami et autres

The bi-directional impulse turbine and the bi-directional flow collector for tidal energy conversion is investigated in this paper. The bi-directional impulse turbine with fixed guide vanes is adopted because the turbine has a high efficiency and an advantage of maintenance. The turbine …

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