The Velocity Aberration Effect of the CSST Main Survey Camera  

作　　者：Hui-Mei Feng Zi-Huang Cao Man ILam Ran Li Hao Tian Xin Zhang Peng Wei Xin-Feng Li Wei Wang Hugh RAJones Mao-Yuan Liu Chao Liu 

机构地区：[1]National Astronomical Observatories,Chinese Academy of Sciences,Beijing 100101,China [2]Institute for Frontiers in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China [3]Key Laboratory of Cosmic Rays(Tibet University),Ministry of Education,Lhasa 850000,China [4]University of Chinese Academy of Sciences,Beijing 100049,China [5]Technology and Engineering Center for Space Utilization,Chinese Academy of Sciences,Beijing 100094,China [6]Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China [7]Centre for Astrophysics,University of Hertfordshire,Hatfield,UK

出　　处：《Research in Astronomy and Astrophysics》2024年第9期119-127,共9页天文和天体物理学研究（英文版）

基　　金：generously supported by the National Natural Science Foundation of China(NSFC,Grant Nos.12073047 and 12273077);the National Key Research and Development(Grant No.2022YFF0711500)。

摘　　要：In this study,we conducted simulations to find the geometric aberrations expected for images taken by the Main Survey Camera of the Chinese Space Station Telescope(CSST)due to its motion.As anticipated by previous work,our findings indicate that the geometric distortion of light impacts the focal plane's apparent scale,with a more pronounced influence as the size of the focal plane increases.Our models suggest that the effect consistently influences the pixel scale in both the vertical and parallel directions.The apparent scale variation follows a sinusoidal distribution throughout one orbital period.Simulations reveal that the effect is particularly pronounced in the center of the Galaxy and gradually diminishes along the direction of ecliptic latitude.At low ecliptic latitudes,the total aberration leads to about a 0.94 pixel offset(a 20 minute exposure)and a 0.26 pixel offset(a 300 s exposure)at the edge of the field of view.Appropriate processings for the geometric effect during the CSST pre-and post-observation phases are presented.

关 键 词：ASTROMETRY telescopes Astronomical Instrumentation Methods and Techniques 

分 类 号：P111[天文地球—天文学]