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等效噪声温差
释义
等效噪声温差
Encyclopedia
工学
辐射度计量
释
noise equivalent temperature difference
等效噪声温差
使用3分贝截止的标准滤波器,在多路传输之前,系统所产生的信号及噪声(均方根值)之比为1时,所需的大空间目标(大于或等于瞬时视场)和背景的温差。又称热灵敏度。是红外探测器能探测到的最小温差,是衡量红外探测器系统性能的重要指标之一,与总体大气透过率、探测器性能参数等因素有关。
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