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首页> 外文期刊>Space Science Reviews >Preflight Calibration Test Results for Optical Navigation Camera Telescope (ONC-T) Onboard the Hayabusa2 Spacecraft
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Preflight Calibration Test Results for Optical Navigation Camera Telescope (ONC-T) Onboard the Hayabusa2 Spacecraft

机译：Phayabusa2 Spacecraft的光学导航摄像机望远镜（ONC-T）预检校准测试结果

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摘要

The optical navigation camera telescope (ONC-T) is a telescopic framing camera with seven colors onboard the Hayabusa2 spacecraft launched on December 3, 2014. The main objectives of this instrument are to optically navigate the spacecraft to asteroid Ryugu and to conduct multi-band mapping the asteroid. We conducted performance tests of the instrument before its installation on the spacecraft. We evaluated the dark current and bias level, obtained data on the dependency of the dark current on the temperature of the charge-coupled device (CCD). The bias level depends strongly on the temperature of the electronics package but only weakly on the CCD temperature. The dark-reference data, which is obtained simultaneously with observation data, can be used for estimation of the dark current and bias level. A long front hood is used for ONC-T to reduce the stray light at the expense of flatness in the peripheral area of the field of view (FOV). The central area in FOV has a flat sensitivity, and the limb darkening has been measured with an integrating sphere. The ONC-T has a wheel with seven bandpass filters and a panchromatic glass window. We measured the spectral sensitivity using an integrating sphere and obtained the sensitivity of all the pixels. We also measured the point-spread function using a star simulator. Measurement results indicate that the full width at half maximum is less than two pixels for all the bandpass filters and in the temperature range expected in the mission phase except for short periods of time during touchdowns.
机译：光学导航摄像头望远镜（ONC-T）是一个伸缩式框架相机，船上的七种颜色Hayabusa2 Spacecraft于2014年12月3日推出。该仪器的主要目标是光学地将航天器光学导航到小行星Ryugu并进行多频段映射小行星。在航天器安装之前，我们对仪器进行了性能测试。我们评估了暗电流和偏置水平，获得了暗电流对电荷耦合器件（CCD）的温度的依赖性的数据。偏置水平依赖于电子包装的温度，但仅在CCD温度下弱。与观察数据同时获得的暗参考数据可用于估计暗电流和偏置水平。长前罩用于ONC-T，以减小杂散光以牺牲视野（FOV）的外围区域的平坦度。 FOV中的中心区域具有平坦的灵敏度，并且已经用积分球测量肢体变暗。 ONC-T有一个带有七个带通滤波器和一个平面玻璃窗的轮子。我们使用积分球来测量光谱灵敏度，并获得所有像素的灵敏度。我们还使用星模拟器测量点扩散函数。测量结果表明，除了在达阵期间短时间的短时间内，所有带通滤波器的全部宽度小于两个像素，并且在任务阶段的温度范围内。

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  • 来源
    《Space Science Reviews》 |2017年第4期|共15页
  • 作者

    Kameda S.; Suzuki H.; Takamatsu T.; Cho Y.; Yasuda T.; Yamada M.; Sawada H.; Honda R.; Morota T.; Honda C.; Sato M.; Okumura Y.; Shibasaki K.; Ikezawa S.; Sugita S.;

  • 作者单位

    Rikkyo Univ Dept Phys Toshima Ku 3-34-1 Nishi Ikebukuro Tokyo 1718501 Japan;

    Meiji Univ Dept Phys Tama Ku 1-1-1 Higashi Mita Kawasaki Kanagawa 2148571 Japan;

    Rikkyo Univ Dept Phys Toshima Ku 3-34-1 Nishi Ikebukuro Tokyo 1718501 Japan;

    Rikkyo Univ Dept Phys Toshima Ku 3-34-1 Nishi Ikebukuro Tokyo 1718501 Japan;

    Rikkyo Univ Dept Phys Toshima Ku 3-34-1 Nishi Ikebukuro Tokyo 1718501 Japan;

    Chiba Inst Technol Planetary Explorat Res Ctr 2-17-1 Tsudanuma Narashino Chiba 2750016 Japan;

    Japan Aerosp Explorat Agcy JAXA Space Explorat Ctr Project HAYABUSA2 Chuo Ku 3-1-1 Yoshinodai Sagamihara Kanagawa 2525210 Japan;

    Kochi Univ Nat Sci Cluster Sci Unit 2-5-1 Akebono Cho Kochi Kochi 7808520 Japan;

    Nagoya Univ Grad Sch Environm Studies Furo Cho Nagoya Aichi 4648601 Japan;

    Univ Aizu Res Ctr Adv Informat Sci &

    Technol Ikkimachi Aizu Wakamatsu Fukushima 9658580 Japan;

    Rikkyo Univ Dept Phys Toshima Ku 3-34-1 Nishi Ikebukuro Tokyo 1718501 Japan;

    Rikkyo Univ Dept Phys Toshima Ku 3-34-1 Nishi Ikebukuro Tokyo 1718501 Japan;

    Rikkyo Univ Dept Phys Toshima Ku 3-34-1 Nishi Ikebukuro Tokyo 1718501 Japan;

    Rikkyo Univ Dept Phys Toshima Ku 3-34-1 Nishi Ikebukuro Tokyo 1718501 Japan;

    Univ Tokyo Grad Sch Sci Dept Earth &

    Planetary Sci Bunkyo Ku 7-3-1 Hongo Tokyo 1130033 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空;
  • 关键词

    ONC; Visible; Multi-band imaging; Asteroid; Hayabusa2; Ryugu;

    机译：ONC;可见;多频带成像;小行星;Hayabusa2;Ryugu;

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