16 - 21 June 2024
Yokohama, Japan
Conference 13093 > Paper 13093-274
Paper 13093-274

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

21 June 2024 • 10:50 - 11:10 Japan Standard Time | Room G414/415, North - 4F

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 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 launch SUIM on the ISS in 2025. In this paper, we report the overview and the development status of this project.

Presenter

Kumiko K. Nobukawa
Kindai Univ. (Japan)
Kumiko Nobukawa is an X-ray astronomer, and studies diffuse X-ray emissions in our galaxy. Also, she developed X-ray CCDs onboard the Hitomi and XRISM satellites. Recently, she led the development and production of Kindai University's first nano-satellite, SpaceTuna1, which was released from the ISS in 2022. Based on this knowledge and experiments, she conceived a project to measure the upper atmospheric density by observing the CXB transmitted through the Earth rim, and she is the PI of the project.
Presenter/Author
Kumiko K. Nobukawa
Kindai Univ. (Japan)
Author
Ayaki Takeda
Univ. of Miyazaki (Japan)
Author
Satoru Katsuda
Saitama Univ. (Japan)
Author
Kyoto Univ. (Japan)
Author
Kazuhiro Nakazawa
Nagoya Univ. (Japan)
Author
Koji Mori
Univ. of Miyazaki (Japan)
Author
Hiroyuki Uchida
Kyoto Univ. (Japan)
Author
Masayoshi Nobukawa
Nara Univ. of Education (Japan)
Author
Univ. of Miyazaki (Japan)
Author
Takumi Kishimoto
Kindai Univ. (Japan)
Author
Kindai Univ. (Japan)
Author
Yuma Aoki
Kindai Univ. (Japan)
Author
Kindai Univ. (Japan)
Author
Kindai Univ. (Japan)
Author
Tomitaka Tanaka
Univ. of Miyazaki (Japan)
Author
Kyoto Univ. (Japan)
Author
Kyoto Univ. (Japan)
Author
Saitama Univ. (Japan)
Author
Tokyo University of Science (Japan)