天基大视场光学观测星图的快速仿真方法

Fast Simulation Method for Space-based Large-field Optical Observation Star Map

摘要:

为了提高天基大视场光学观测星图的仿真速度，提出了一种天基大视场光学观测星图的快速仿真方法。首先，阐述了真实星图的成像原理，设计了天基光学观测星图的仿真流程；接着，通过分析各流程的计算方式，得出了点扩散函数的计算是影响仿真速度的主要因素；最后，结合CCD器件的成像机理与真实图像的特点，建立了自适应的点扩散函数，实现了天基大视场光学观测星图的快速仿真。仿真实验表明，本方法在保证成像逼真度的同时，仿真速度较传统成像方法提升47%左右，对天基光学观测平台的研制具有重要作用。

Abstract:

In order to improve the simulation speed of space-based large-field optical observation star map, a fast simulation method for space-based large-field optical observation star map is proposed. First, the imaging principle of real star map is explained, and the simulation process of space-based optical observation star map is designed. Then, by analyzing the calculation methods of each process, it is concluded that the calculation of the point spread function is the main factor affecting the simulation speed. Finally, combining the imaging mechanism of the CCD device and the characteristics of the real image, an adaptive point spread function is established to realize the rapid simulation of the space-based large-field optical observation star map. The simulation experiment shows that this method can increase the simulation speed by about 47% compared with the traditional imaging method while ensuring the fidelity of the imaging, which plays an important role in the development of the space-based optical observation platform.