摘要
探测距离是衡量空间目标天基可见光相机探测、识别能力的一项重要指标。本文从辐射度学和光度学出发,通过对目标光度特性、天空背景特性、CCD噪声特性进行计算分析,建立了信噪比模型,信噪比模型是关于探测距离和成像像元个数的隐式。根据Johnson法则中成像像元个数与探测效果的对应关系,得出探测信噪比、探测距离与探测效果之间的关系。最后,以美国林肯实验室研制的传感器SBV为例,通过Matlab进行仿真计算。为天基光学探测的性能评估和传感器设计提供了一定的参考。
The range of detection is one important specification for expressing the ability of detection and recognition of space-based optical camera.According to the principles of photometry and radiometry,through analysis of the target luminosity characteristics,the sky background characteristics and the CCD SNR characteristics,SNR model was established.According to the connection between the pixel numbers and the detection result,the relationship among SNR,detection distance and detection result was obtained.At last,taking the SBV sensor developed by American,the simulation and calculation were made through Matlab.All of this can provide reference for performance evaluation of the space-based optical detection and the sensor design.
出处
《光机电信息》
2011年第10期39-43,共5页
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