The Extreme Ultraviolet Imagers (EUVIs): Earth-observing telescopes on International Space Station

Kentaro Uji; Ichiro Yoshikawa; Kazuo Yoshioka; Go Murakami; Atsushi Yamazaki

doi:10.1117/12.977429

9 November 2012 The Extreme Ultraviolet Imagers (EUVIs): Earth-observing telescopes on International Space Station

Kentaro Uji, Ichiro Yoshikawa, Kazuo Yoshioka, Go Murakami, Atsushi Yamazaki

Proceedings Volume 8528, Earth Observing Missions and Sensors: Development, Implementation, and Characterization II; 85281M (2012) https://doi.org/10.1117/12.977429
Event: SPIE Asia-Pacific Remote Sensing, 2012, Kyoto, Japan

Abstract

The Extreme Ultraviolet Imagers (EUVIs) were launched on 21st July 2012 as payloads to the Exposed Facility of the Japanese Experiment Module (JEM-EF) on the International Space Station. The EUVIs are parts of the IMAP (Ionosphere, Mesosphere, upper Atmosphere, and Plasmasphere mapping) mission to observe the Earth’s upper atmosphere, mesosphere, ionosphere, thermosphere and plasmasphere. The other part of IMAP is a visible and near-infrared spectral imager (VISI). In this mission, we install two independent and identical telescopes. One telescope detects the terrestrial EUV emission from O⁺ (at the wavelength of 83.4 nm), and the other one detects He⁺ (30.4 nm). At the altitude of approximately 400 km, the two telescopes direct towards the Earth’s limb to look at the ionosphere and plasmasphere from the inside-out. The maximum spatial resolution is 0.1° and time resolution is 1 minute. The optical instruments consist of multilayer coated mirrors which are optimized for 30.4 nm, metallic thin filters and 5-stage microchannel plates to pick up photon events efficiently. In our presentation, we report the mission overview, the instruments and the result of ground calibrations.

Citation Download Citation

Kentaro Uji, Ichiro Yoshikawa, Kazuo Yoshioka, Go Murakami, and Atsushi Yamazaki "The Extreme Ultraviolet Imagers (EUVIs): Earth-observing telescopes on International Space Station", Proc. SPIE 8528, Earth Observing Missions and Sensors: Development, Implementation, and Characterization II, 85281M (9 November 2012); https://doi.org/10.1117/12.977429

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