Adaptive Optics for Satellite and Debris Imaging in LEO and GEO

Adaptive Optics for Satellite and Debris Imaging in LEO and GEO
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用于 LEO 和 GEO 卫星和碎片成像的自适应光学器件

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发表时间:
2016
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通讯作者:
Craig Smith
Craig Smith
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作者:
M. Copeland;F. Bennet;A. Zovaro;F. Riguat;P. Piatrou;V. Korkiakoski;Craig Smith

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澳大利亚国立大学天文学和天体物理研究学院 (RSAA) 开发了自适应光学 (AO) 系统,用于低地球轨道 (LEO) 和地球静止轨道 (GEO) 的卫星和碎片成像。在 LEO 中,将以 800 公里范围内的物体、800 纳米成像波长的分辨率为 50 厘米来测量物体的尺寸、形状和方向。在GEO中,卫星位置将通过附近恒星的精密天体测量来测量。我们使用带有 277 个执行器的变形镜 (DM) 和运行频率为 2 kHz 的 Shack-Hartmann 波前传感器的 AO 系统。成像以 >30 Hz 的速率进行,以减少由于倾斜和旋转而导致的图像模糊。我们使用两种成像模式;用于获取奈奎斯特采样图像的高分辨率模式和具有 75 弧秒视场的采集模式以帮助寻找目标。
The Research School of Astronomy and Astrophysics (RSAA) at the Australian National University has developed and Adaptive Optics (AO) system for satellite and debris imaging in low Earth orbit (LEO) and geostationary orbit (GEO). In LEO the size, shape and orientation of objects will be measured with resolution of 50 cm for objects at 800 km range at an 800 nm imaging wavelength. In GEO satellite position will be measured using precision astrometry of nearby stars. We use an AO system with a deformable mirror (DM) of 277 actuators and Shack-Hartmann wavefront sensor operating at 2 kHz. Imaging is performed at a rate of >30 Hz to reduce image blur due to tip-tilt and rotation. We use two imaging modes; a high resolution mode to obtain Nyquist sampled images and a acquisition mode with 75 arcsecond field of view to aid in finding targets.