The weapon operator search and locate the target using a periscope optical sight (7km range) in day light, or a thermal imager at night or in bad weather conditions.
武器操作员在白天亮光下使用一个潜望镜白光瞄准镜（7公里范围）或在不良天气条件或夜间使用热成像去搜寻和定位目标。
When the detection range of the IR thermal imager is calculated by using NETD, the target radiation brightness difference must be calculated in the operating wave band.
在采用NETD计算红外热像仪的探测距离时，需要计算目标在热像仪探测波段范围内的辐射亮度差。
The properties of Mahalanobis range are discussed in this paper . A Recognition method of radar target is proposed using range profile.
讨论了马氏距离的性质，利用目标的一维距离像，提出了一种雷达目标识别方法。
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