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SHAO Jinfa, CHANG Yuan, YU Qinglong, ZHANG Xianguo, LU Li, XIE Zhong, LAN Jian, YU Xiancai, JIA Shuai, HUANG Chenxi, LIU Lijun, SUN Yueqiang, ZHAO Xunfeng, GENG Hao, XUE Changbin. Study on the Calibration Method of the Grid-based Energetic Neutral Atom Imager Array (GENA) for the Queqiao-2 Relay Satellite Mission (in Chinese). Chinese Journal of Space Science, 2026, 46(2): 1-10 doi: 10.11728/cjss2026.02.2025-0112
Citation: SHAO Jinfa, CHANG Yuan, YU Qinglong, ZHANG Xianguo, LU Li, XIE Zhong, LAN Jian, YU Xiancai, JIA Shuai, HUANG Chenxi, LIU Lijun, SUN Yueqiang, ZHAO Xunfeng, GENG Hao, XUE Changbin. Study on the Calibration Method of the Grid-based Energetic Neutral Atom Imager Array (GENA) for the Queqiao-2 Relay Satellite Mission (in Chinese). Chinese Journal of Space Science, 2026, 46(2): 1-10 doi: 10.11728/cjss2026.02.2025-0112
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Study on the Calibration Method of the Grid-based Energetic Neutral Atom Imager Array (GENA) for the Queqiao-2 Relay Satellite Mission

doi: 10.11728/cjss2026.02.2025-0112 cstr: 32142.14.cjss.2025-0112
  • 1.

    National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • 2.

    Beijing Key Laboratory of Space Environment Exploration, National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • 3.

    University of Chinese Academy of Sciences, Beijing 100049

  • 4.

    Shanghai Institute of Satellite Engineering, Shanghai 201109

  • Received Date: 2025-07-04
  • Rev Recd Date: 2026-01-13
    • Available Online: 2026-03-12
    Abstract
  • The Grid-Based Energetic Neutral Atom imager (GENA) onboard the Queqiao-2 Satellite is the first lunar-based magnetospheric Energetic Neutral Atom (ENA) panoramic remote sensing imaging payload. It aims to provide scientific data support for the study of the injection triggering mechanism of the Earth's magnetospheric substorm, the magnetotail energy conversion mechanism, and the generation process of the Earth's magnetic storm through high temporal and spatial resolution observation data. The GENA innovatively combines the time-of-flight method with the two-dimensional coded modulation imaging technology to achieve accurate detection of single-particle events and large-scale, high-resolution magnetospheric neutral atom remote sensing imaging. It can be used to measure 4～200 keV H atoms and 8～250 keV O atoms, and the energy resolution is better than 1 keV @10 keV. At the same time, its instrument field of view is greater than 20°×45°, and the resolution of ENA remote sensing images is better than 0.5°. To accurately calibrate the above performance indicators of the GENA, a study on the calibration method of the GENA was carried out. The accelerator beam calibration test verifies the GENA’s ability to identify the type of neutral atoms and measure their energy, and the optical calibration test verifies the GENA’s field of view coverage and image resolution. The calibration test results show that the GENA’s ability to measure H and O atoms can cover the design indicators.

     

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