星载TDI CCD相机成像仿真系统的实现

Development of TDI CCD Camera Image Simulator

以VC++6.0为开发环境,基于航天TDI(Time Delay and Integration)CCD相机地物点与像点的映射模型,开发了TDI CCD相机成像仿真软件系统,建立了由卫星单轴气浮姿态控制仿真台和地面星载TDI CCD相机成像仿真软件系统构成的实时航天TDI CCD相机成像仿真平台,可动态模拟航天TDI CCD相机在进行标称偏流角调节后卫星姿态角速度误差对航天TDI CCD相机成像的影响,仿真结果与实际成像结果基本一致.

TDI reconnaissance （Time Delay and Integration） CCD But this kind of camera introduces camera has been used widely in space-based large amounts of image smear. To analyze the image smear sources, a space TDI CCD mathematical model which scans the camera pixels corresponding relations with the point of scenery was established. It can be used to reckon cumulating image smear where the TDI CCD imaging exceeded the corresponding pixel horizontal and vertical offset. Based on the space TDI CCD mathematical mode, a TDI CCD camera imaging emulator software is developed with VC＋＋ 6.0. To provide a real satellite TDI CCD imaging simulation space environment for the emulator software, a satellite attitude control single-axis simulation flotation was established. The TDI CCD camera imaging emulator software and the satellite attitude control single-axis simulation flotation constitute the real-time space TDI CCD camera imaging simulation platform, which can dynamically simulates the real-time effect of satellite attitude error to the image process of space TDI CCD camera imaging with nominal deviant angle adjustment. Simulation results show that the angular velocity of yaw angle has the greatest impact on image quality, and roll attitude angle almost has no effect on image quality, which are consistent with the real TDI CCD image.