NASA’s OSIRIS-REx asteroid sample return mission spacecraft includes the Touch And Go Camera System (TAGCAMS) three camera-head instrument. The purpose of TAGCAMS is to provide imagery during the mission to facilitate navigation to the target asteroid, confirm acquisition of the asteroid sample, and document asteroid sample stowage. The cameras were designed and constructed by Malin Space Science Systems (MSSS) based on requirements developed by Lockheed Martin and NASA. All three of the cameras are mounted to the spacecraft nadir deck and provide images in the visible part of the spectrum, 400–700 nm. Two of the TAGCAMS cameras, NavCam 1 and NavCam 2, serve as fully redundant navigation cameras to support optical navigation and natural feature tracking. Their boresights are aligned in the nadir direction with small angular offsets for operational convenience. The third TAGCAMS camera, StowCam, provides imagery to assist with and confirm proper stowage of the asteroid sample. Its boresight is pointed at the OSIRIS-REx sample return capsule located on the spacecraft deck. All three cameras have at their heart a 2592×1944pixel$2592 \times 1944~\mbox{pixel}$ complementary metal oxide semiconductor (CMOS) detector array that provides up to 12-bit pixel depth. All cameras also share the same lens design and a camera field of view of roughly 44∘×32∘$44^{\circ} \times 32^{\circ}$ with a pixel scale of 0.28 mrad/pixel. The StowCam lens is focused to image features on the spacecraft deck, while both NavCam lens focus positions are optimized for imaging at infinity. A brief description of the TAGCAMS instrument and how it is used to support critical OSIRIS-REx operations is provided.

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用于 OSIRIS-REx 小行星样本返回任务的 Touch And Go 相机系统 (TAGCAMS)

NASA 的 OSIRIS-REx 小行星样本返回任务航天器包括 Touch And Go 相机系统 (TAGCAMS) 三摄像头仪器。TAGCAMS 的目的是在任务期间提供图像，以方便导航到目标小行星，确认小行星样本的获取，并记录小行星样本的装载。这些相机是由马林空间科学系统公司 (MSSS) 根据洛克希德马丁公司和 NASA 制定的要求设计和制造的。所有三台相机都安装在航天器天底甲板上，并提供可见光谱部分（400-700 nm）的图像。其中两台 TAGCAMS 摄像机 NavCam 1 和 NavCam 2 用作完全冗余的导航摄像机，以支持光学导航和自然特征跟踪。为了操作方便，它们的视轴以小角度偏移在天底方向对齐。第三个 TAGCAMS 相机 StowCam 提供图像以协助和确认小行星样本的正确存放。它的视轴指向位于航天器甲板上的 OSIRIS-REx 样本返回舱。这三款相机的核心都是 2592×1944pixel$2592 \times 1944~\mbox{pixel}$ 互补金属氧化物半导体 (CMOS) 探测器阵列，可提供高达 12 位像素深度。所有相机还共享相同的镜头设计和大约 44∘×32∘$44^{\circ} \times 32^{\circ}$ 的相机视野，像素比例为 0.28 mrad/pixel。StowCam 镜头聚焦于航天器甲板上的图像特征，而两个 NavCam 镜头聚焦位置都针对无限远成像进行了优化。