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Optomechanical design of a wide-field auroral imager on Fengyun-3D

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Abstract

We present the optomechanical design and development of a wide-field auroral imager (WAI) on board the satellite Fengyun-3D. The optomechanical system of the WAI features a combination of a large field of view and a single-axis scanning mechanism. The combination makes the WAI perform better than its counterparts in temporal resolution in a low Earth orbit. In-orbit tests have verified the survival of WAI in the launching vibration and space environment. It has functioned on-orbit since 2018, with a spatial resolution of ${\sim}{{10}}\;{\rm{km}}$ at the nadir point, at a reference height of 110 km above the ionosphere.

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Data availability

Data underlying the results presented in this paper are available in Ref. [28].

28. Data Analysis Center for Geomagnetism and Space Magnetism, Kyoto University, “World Data Center for Geomagnetism: real-time AE index,” 2018, http://wdc.kugi.kyoto-u.ac.jp/ae_realtime/201805/index_20180505.html.

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