[P-EM13] Coupling Processes in the Atmosphere-Ionosphere System

[PEM13-P05] 中低緯度における夜間大気光多点観測用小型カメラのテスト観測

*塩川 和夫¹、山本 優佳¹、足立 匠¹、川合 航輝¹、中村 幸暉¹、Liu Jie¹、Chen Liwei¹、加藤 悠斗¹、坪井 巧馬¹、佐藤 雅紀¹、椙村 怜¹、大西 智香¹、遠山 航平¹、野村 佳槻¹、三好 由純¹、小川 泰信²、江尻 省²、細川 敬祐³、鈴木 臣⁴、坂野井 健⁵ (1.名古屋大学宇宙地球環境研究所、2.国立極地研究所、3.電気通信大学、4.愛知大学、5.東北大学)

キーワード：夜間大気光、小型カメラ、装置開発

We are developing low-cost small all-sky imagers for measurements of airglow at middle and low latitudes. The imagers consist of a CCD camera (WATEC WAT-910HX) with a fish-eye lens Fujinon FE1185C057HA-1 and band-bass filters with bandwidths of ~10 nm (Ogawa et al., 2020). This camera succeeded to obtain plasma bubble images using a 630-nm filter (Hosokawa et al., 2020). From test observations at Shigaraki, Japan (34.8N, 136.1E), in August 2021, we also obtain mesospheric gravity wave images using a 557.7-nm filter. We are also testing a CMOS camera (ZWO ASI294MM Pro) as a detector of all-sky imagers of Optical Mesosphere Thermosphere Imagers (OMTIs, Shiokawa et al., 1999). This set of OMTI optics (KEO Sentry 3) with the ZWO camera succeeded to obtain images of gravity waves at 557.7-nm and medium-scale traveling ionospheric disturbances at 630.0 nm at Sata, Japan (31.0N, 130.7E). In addition, three sets of the Fujinon lens and the ZWO camera are tested at Shigaraki, Japan, since January 22, 2022, for airglow measurements in 557.7 nm, 630.0 nm, and OH-band emissions. These CCD and CMOS cameras cost US$1000-2000, which is 20-40 times cheaper than the previous cooled-CCD camera used for OMTIs. We plan to distribute these low-cost small all-sky imagers in Europe, Asia, and Africa to make multi-point measurements of airglow images at middle and low latitudes.

Ogawa et al. (Polar Sci., 2020, https://doi.org/10.1016/j.polar.2019.100501)
Hosokawa et al. (EPS, 2020, https://doi.org/10.1186/s40623-020-01187-1)
Shiokawa et al. (EPS, 1999, https://doi.org/10.1186/BF03353247)