航天遥感器的空间目标成像模型研究

提出了一种新的空间目标的成像模型,用于仿真模拟航天遥感器观测到的空间目标成像特性的分析与实验.假定空间目标几何形状为球形,使用已有的空间目标照度计算公式,建立了目标星等仿真计算模型;通过使用航天遥感器CCD、光学系统参数和目标星等计算模型,可得到空间目标在理想观测条件下的航天遥感器焦平面上点源响应的信号强度和图像;考虑到航天遥感器与空间目标的相对运动关系,建立了空间目标在实际观测条件下的航天遥感器焦平面上线成像的能量分布模型和运动引起的模糊图像;综合使用上述几种模型,可生成空间目标在航天遥感器不同成像观测条件下的动态帧序列图像,以满足空间目标的探测与识别仿真算法研究的需求.

Imaging model study of space objects from space remote sensor

A new imaging model for space objects was produced to simulate the imaging characteristic of space objects detected by space remote sensor.By employing the known luminous flux computing formula of space objects with the assumption that the geometric appearance of space object is globose,the object star-magnitude model was produced.Based on CCD and optical system parameters of space remote sensor,the point source signal intensity response and picture of space objects in focal plane of the space remote sensor were obtained on perfect observation conditions.The energy distribution model of lined imaging of space objects in focal plane of the space remote sensor on actual observation conditions was created.According to above models,the dynamic frame sequence of space objects in different observation conditions was simulated,which can be applied to the detecting and identifying simulation algorithms of space objects.