太阳X-EUV成像望远镜的移动补偿系统

张鑫; 苏东林; 李保权; 彭吉龙

太阳X-EUV成像望远镜的移动补偿系统

1.
北京航空航天大学电子信息工程学院, 北京 100083
2. 中国科学院空间科学与应用研究中心, 北京 100080

基金项目: 国家自然科学基金资助项目(40474069)

详细信息

中图分类号: TH 753.19
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出版历程
- 收稿日期: 2006-04-10
- 网络出版日期: 2007-03-31

Jitter compensation system in solar X-EUV imaging telescope

1.
School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
2. Center for Space Science and Applied Research,Chinese Academy of Sciences, Beijing 100080, China

摘要

摘要: 卫星帆板转动和自身颤动会导致太阳X射线-极紫外射线(X-EUV)成像望远镜的成像质量下降.用移动补偿系统控制相机的CCD驱动器,使势阱转移到相邻相的位置上,转移的方向正好与图像在传感器上移动方向一致,使得图像的每个光子在移动后仍然落入传感器的同一个势阱内,补偿由于帆板移动造成的图像偏移.CCD相移沿列的方向进行,而CCD的列平行于东西向.高精度太阳敏感器使用两轴直角坐标来定位太阳的位置.移动补偿系统只使用其中一个轴向数据,由于南北指向误差远远小于东西指向,因此不对南北指向补偿.该移动补偿系统利用高精度太阳敏感器构成半闭环控制系统,通过偏移CCD势阱来实现一个方向上的移动补偿.该方案可以在不增加成本的前提下,消除长时间曝光过程中的太阳的平移和帆板颤动对图像质量造成的影响,扩大动态观测范围.
- 空间天气 /
- 空间望远镜 /
- 移动补偿
Abstract: The constant attitude control motions of the satellite often result in a platform that is not stable enough for mounting a high-resolution telescope. The jitter compensation system commands the CCD camera to shift one phase in the appropriate direction so that light from a point of the sun will continue to fall into the same CCD potential well. The CCD pixels phase shift along the detector-s columns which are aligned parallel to east-west. The high accuracy sun sensor (HASS) uses two reticles, which one is for each axis to determine the relative position of the sun. Only one axis of the HASS data is used for motion compensation. The north-south pointing errors are significantly smaller then the east-west errors, and are not compensated for by the system. The jitter compensation system incorporates HASS that is used in a semi-closed loop system to shift the CCD potential wells in order to compensate for jitter in one dimension. The motion compensation system can remove the solar "drift" and the solar array jitter during the exposure, and the X-ray imaging performance will be improved.
- space weather /
- space telescope /
- jitter compensation

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参考文献(1)

[1] 张鑫,苏东林,李保全,等. 太阳X-EUV成像望远镜波长选择装置[J].北京航空航天大学学报,2006,32(4):421-425 Zhang Xin, Su Donglin, Li Baoquan, et al.Filter wheel device in solar X-EUV image telescope[J]. Journal of Beijing University of Aeronautics and Astronautics[J]. 2006, 32(4):421-425(in Chinese) [2] 李保权,朱光武,王世金,等. 太阳X-EVU成像望远镜[J].地球物理学报,2005,48(2):235-242 Li Baoquan, Zhu Guangwu, Wang Shijin, et al. The solar X-EUV imaging telescope[J]. Chinese Journal of Geophysics, 2005,48(2):235-242(in Chinese) [3] Baker D N. What is space weather[J]. Adv Space Res,1998,22(1):7-16 [4] Kathleen Freestone. Telemetry and control for the solar X-ray imager . SXI-013,1997 [5] 徐鹏, 黄长宁,王涌天,等.卫星振动对成像质量影响的仿真分析[J].宇航学报,2003,24(3):259-263 Xu Peng,Huang Changning,Wang Yongtian,et al. Modulation transfer function in push-broom camera limits resulting from mechanical vibration[J]. Journal of Astronautic,2003,24(3):259-263(in Chinese) [6] Pendergast Karl J, Schauwecker Chris J. Use of a passive reaction wheel jitter isolation system to meet the advanced X-ray astrophysics facility imaging performance requirements[J]. SPIE, 1998, 3356(2):1078-1094 [7] Lemen J R, Duncan D, Edwards C,et al. Solar X-ray imager for GOES[J].SPIE,2003,5171(1):65-76 [8] Bornmann P L, Speich D, Hirman J,et al. GOES solar X-ray imager:overview and operational goals[J]. SPIE, 1996, 2812(2):309-319 [9] Hill S, Pizzo V J. Advanced solar imaging from the GOES-R spacecraft[J]. SPIE, 2003, 4853(2):465-478 [10] Stern R A, Shing L, Catura P,et al. Characterization of the flight CCD dectors for the GOES N and O solar X-ray imagers[J]. SPIE, 2003,5171(1):1-6 [11] Brennan Gantner L, James Lemen R, Christopher Edwards G,et al. A system to reduce jitter for the GOES N/O/P solar X-ray imager[J]. SPIE, 2004, 5171(2):101-110 [12] Catura P R, Gantner B L, Jurcevich B K,et al. X-ray calibration of the GOES-N/O solar X-ray imagers[J]. SPIE, 2003,5171(1):1-10

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