论文标题
星际阵型飞行I：光学传感
Starshade formation flying I: optical sensing
论文作者
论文摘要
《星际》的关键挑战是编队飞行。为了成功地图像系外行星，在数万公里的分离时，望远镜的射手和星际胸衣必须对齐至〜1 m。这一挑战有两个部分：首先，必须感知星际相对于望远镜的相对位置；其次，必须将传感器测量与对照定律结合使用，以使两个航天器在引力和其他干扰存在下保持对齐。在这项工作中，我们在2.4米的望远镜中使用瞳孔成像摄像头提出了一种光学传感方法，该方法可以在1 s内测量相对的航天器轴承的相对航天器，比任何相关的动态干扰都要快得多。同伴论文将描述如何将该传感器与对照定律结合在一起，以使两个航天器与科学观察的最小中断保持一致。
A key challenge for starshades is formation flying. To successfully image exoplanets, the telescope boresight and starshade must be aligned to ~1 m at separations of tens of thousands of kilometers. This challenge has two parts: first, the relative position of the starshade with respect to the telescope must be sensed; and second, sensor measurements must be combined with a control law to keep the two spacecraft aligned in the presence of gravitational and other disturbances. In this work, we present an optical sensing approach using a pupil imaging camera in a 2.4-m telescope that can measure the relative spacecraft bearing to a few centimeters in 1 s, much faster than any relevant dynamical disturbances. A companion paper will describe how this sensor can be combined with a control law to keep the two spacecraft aligned with minimal interruptions to science observations.
