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Telescope Co-Alignment Design and Its Performance On-Orbit of Solar Observational Satellite 'Hinode'

机译:太阳观测卫星“日出”的望远镜共对准设计及其在轨性能

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摘要

The three telescopes on Hinode, a highly sophisticated solar observational satellite, must be able to simultaneously observe the same point on the sun in order to ascertain data on the physical mechanisms for activity and heating in the solar atmosphere. To fulfill this mission requirement, the telescopes must remain co-aligned to within 2.0 arcsec under the temperature fluctuations the satellite experiences while orbiting the earth. Hinode consists of two modules and a connecting structure. Most of the structural elements are made of CFRP in order to suppress thermal deformations. In particular, the laminate configuration of the CFRP in the module holding the telescopes was carefully designed in terms of not only its stiffness and strength but also its coefficient of thermal expansion and thermal conductivity. A thermal deformation analysis was performed to estimate the co-alignment drift on-orbit and a thermal deformation test was conducted to verify the estimation. The results showed that the structural design would sufficiently suppress the drift on-orbit. Measurements on-orbit were conducted using the image of the sun, and the measured drift was in good agreement with the estimation.
机译:Hinode(高度复杂的太阳观测卫星)上的三架望远镜必须能够同时观测太阳上的同一点,以便确定有关太阳大气中活动和加热的物理机制的数据。为了满足这一任务要求,在卫星绕地球旋转时,在卫星经受的温度波动下,望远镜必须保持在2.0弧秒以内共对准。 Hinode由两个模块和一个连接结构组成。大多数结构元件由CFRP制成,以抑制热变形。特别是,在固定望远镜的模块中,CFRP的层压结构不仅经过精心设计,不仅具有刚度和强度,还具有热膨胀系数和导热系数。进行热变形分析以估计共对准漂移在轨,并且进行热变形测试以验证该估计。结果表明,结构设计将充分抑制轨道漂移。使用太阳图像进行在轨测量,测得的漂移与估算值吻合良好。

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