Performance of Hayabusa2 DCAM3-D camera for short-range imaging of SCI and ejecta curtain generated from the artificial impact crater formed on asteroid 162137 Ryugu (1999 JU3).
Performance of Hayabusa2 DCAM3-D camera for short-range imaging of SCI and ejecta curtain generated from the artificial impact crater formed on asteroid 162137 Ryugu (1999 JU3).
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Hayabusa2 DCAM3-D 相机对 SCI 和小行星 162137 Ryugu (1999 JU3) 上形成的人工撞击坑产生的喷射幕进行短程成像的性能。
DOI：
10.1007/s11214-016-0298-4
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Y. Ikeda
中科院分区：
文献类型：
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作者：
Ishibashi;K.;K. Shirai;K. Ogawa;K. Wada;R. Honda;M. Arakawa;N. Sakatani;Y. Ikeda
可展开相机 3-D (DCAM3-D) 是隼鸟 2 号仪器之一可展开相机 3 (DCAM3) 上配备的小型高分辨率相机。隼鸟 2 号将探索小行星 162137 Ryugu (1999 JU3)，并使用名为小型随身撞击器 (SCI) 的线性射击装置进行撞击实验。 DCAM3将与隼鸟2号航天器分离并观察撞击实验。观测的目的是了解撞击条件，估计小行星龙宫的表面结构，并了解低重力天体撞击现象的物理原理。 DCAM3-D对成像性能要求很高，因为它需要对不同尺度和亮度的多个目标进行成像和检测，即1公里距离拍摄前的微弱SCI、撞击产生的明亮喷射物以及小行星。在本文中，我们报告了 CMOS 成像传感器和 DCAM3-D 光学系统的性能评估。我们还描述了 DCAM3-D 的校准。我们确认DCAM3-D的成像性能满足达到观察目的所需的值。
Deployable Camera 3-D (DCAM3-D) is a small high-resolution camera equipped on Deployable Camera 3 (DCAM3), one of theHayabusa2instruments.Hayabusa2will explore asteroid 162137 Ryugu (1999 JU3) and conduct an impact experiment using a liner shooting device called Small Carry-on Impactor (SCI). DCAM3 will be detached from theHayabusa2spacecraft and observe the impact experiment. The purposes of the observation are to know the impact conditions, to estimate the surface structure of asteroid Ryugu, and to understand the physics of impact phenomena on low-gravity bodies. DCAM3-D requires high imaging performance because it has to image and detect multiple targets of different scale and radiance, i.e., the faint SCI before the shot from 1-km distance, the bright ejecta generated by the impact, and the asteroid. In this paper we report the evaluation of the performance of the CMOS imaging sensor and the optical system of DCAM3-D. We also describe the calibration of DCAM3-D. We confirmed that the imaging performance of DCAM3-D satisfies the required values to achieve the purposes of the observation.