SUIM project: measuring the upper atmosphere from the ISS by observations of the CXB transmitted through the Earth rim

Kumiko K. Nobukawa; Ayaki Takeda; Satoru Katsuda; Takeshi G. Tsuru; Kazuhiro Nakazawa; Koji Mori; Hiroyuki Uchida; Masayoshi Nobukawa; Eisuke Kurogi; Takumi Kishimoto; Reo Matsui; Yuma Aoki; Yamato Ito; Satoru Kuwano; Tomitaka Tanaka; Mizuki Uenomachi; Masamune Matsuda; Takaya Yamawaki; Takayoshi Kohmura

doi:10.1117/12.3019901

21 August 2024 SUIM project: measuring the upper atmosphere from the ISS by observations of the CXB transmitted through the Earth rim

Kumiko K. Nobukawa, Ayaki Takeda, Satoru Katsuda, Takeshi G. Tsuru, Kazuhiro Nakazawa, Koji Mori, Hiroyuki Uchida, Masayoshi Nobukawa, Eisuke Kurogi, Takumi Kishimoto, Reo Matsui, Yuma Aoki, Yamato Ito, Satoru Kuwano, Tomitaka Tanaka, Mizuki Uenomachi, Masamune Matsuda, Takaya Yamawaki, Takayoshi Kohmura

Author Affiliations +

Proceedings Volume 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray; 130932G (2024) https://doi.org/10.1117/12.3019901
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

The upper atmosphere at the altitude of 60–110 km, the mesosphere and lower thermosphere (MLT), has the least observational data of all atmospheres due to the difficulties of in-situ observations. Previous studies demonstrated that atmospheric occultation of cosmic X-ray sources is an effective technique to investigate the MLT. Aiming to measure the atmospheric density of the MLT continuously, we are developing an X-ray camera, “Soipix for observing Upper atmosphere as Iss experiment Mission (SUIM)”, dedicated to atmospheric observations. SUIM will be installed on the exposed area of the International Space Station (ISS) and face the ram direction of the ISS to point toward the Earth rim. Observing the cosmic X-ray background (CXB) transmitted through the atmosphere, we will measure the absorption column density via spectroscopy and thus obtain the density of the upper atmosphere. The X-ray camera is composed of a slit collimator and two X-ray SOI-CMOS pixel sensors (SOIPIX), and will stand on its own and make observations, controlled by a CPU-embedded FPGA “Zynq”. We plan to install the SUIM payload on the ISS in 2025 during the solar maximum. In this paper, we report the overview and the development status of this project.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Kumiko K. Nobukawa, Ayaki Takeda, Satoru Katsuda, Takeshi G. Tsuru, Kazuhiro Nakazawa, Koji Mori, Hiroyuki Uchida, Masayoshi Nobukawa, Eisuke Kurogi, Takumi Kishimoto, Reo Matsui, Yuma Aoki, Yamato Ito, Satoru Kuwano, Tomitaka Tanaka, Mizuki Uenomachi, Masamune Matsuda, Takaya Yamawaki, and Takayoshi Kohmura "SUIM project: measuring the upper atmosphere from the ISS by observations of the CXB transmitted through the Earth rim", Proc. SPIE 13093, Space Telescopes and Instrumentation 2024: Ultraviolet to Gamma Ray, 130932G (21 August 2024); https://doi.org/10.1117/12.3019901

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