装甲目标3mm波段辐射亮温的平缓解

Flat solution of brightness temperatures of the armoured targets in the 3mm wave radiometric measurements

毫米波辐射计的无源被动探测技术具有很强的隐蔽性和很好的抗干扰性能,因此被应用于反装甲导弹和灵巧弹寻的制导等领域。为从测得的天线温变数据或天线温度分布函数中反演出目标的亮温分布,以有效地探测与识别目标,必须采用适应的反演方法得到尽可能好的反演解或与精确值相近的近似解。从样条空间出发给出了毫米波目标辐射亮温的平缓解,即一阶微分内积最小的解,并将其应用于毫米波辐射探测中。

Millimeter waves are practically impossible to be detected. The radiometric signal is incoherent, there is no explicit signal interference problem. The millimeter wave radiometer passive detection technique is applied in the important fields, sush as homing guidance in anti-armour missile and smart bomb. In order to obtain the radiometric brightness temperature of a target in millimeter wave radiometric measurements, a Fredholm integral equation of the first kind must be solved. This equation is highly unstable and yields unrealistic results when it is ill-posed. The spline space and the flat solution of armored target's brightness temperature are presented and then applied in millimeter wave radiometric measurements.