使NuSTAR对准目标：预测桅杆运动
Getting NuSTAR on target: predicting mast motion
摘要：
核光谱望远镜阵列（NuSTAR）是第一个从低地球轨道运行四年的聚焦高能（3-79 keV）X射线天文台。X射线探测器阵列位于航天器总线上，光学模块安装在10.14米长的柔性桅杆上。在每次观测期间，望远镜光轴在探测器上的运动由激光计量系统测量，并与航天器进入和离开地球阴影每个轨道时桅杆热弯曲的发射前预测相匹配。然而，在天文台调试期间发现了望远镜视场的额外运动，这与航天器姿态控制系统和与观测太阳方位角相关的桅杆的额外弯曲有关。我们提出的方法来预测任何特定的目标坐标将落在NuSTAR探测器的太阳方位角的基础上，在预定的时间观测。这可能适用于未来的天文台，采用光学部署在可扩展的桅杆。预报系统的自动化大大提高了观测工作的效率和观测计划的可靠性。
英文摘要：
The Nuclear Spectroscopic Telescope Array (NuSTAR) is the first focusing high energy (3-79 keV) X-ray observatory operating for four years from low Earth orbit. The X-ray detector arrays are located on the spacecraft bus with the optics modules mounted on a flexible mast of 10.14m length. The motion of the telescope optical axis on the detectors during each observation is measured by a laser metrology system and matches the pre-launch predictions of the thermal flexing of the mast as the spacecraft enters and exits the Earths shadow each orbit. However, an additional motion of the telescope field of view was discovered during observatory commissioning that is associated with the spacecraft attitude control system and an additional flexing of the mast correlated with the Solar aspect angle for the observation. We present the methodology developed to predict where any particular target coordinate will fall on the NuSTAR detectors based on the Solar aspect angle at the scheduled time of an observation. This may be applicable to future observatories that employ optics deployed on extendable masts. The automation of the prediction system has greatly improved observatory operations efficiency and the reliability of observation planning.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
