红外双色单站被动定位方法

Infrared Double-color Mono-station Passive Positioning by Colorimetric Method

摘要:

设计了合作目标与非合作目标的红外双色单站被动定位算法, 通过实例计算的方式证明了该方法的正确性与有效性。分析了双色消光系数差异大小以及目标温度高低对测距定位性能的影响, 得出双色消光系数差异越小、目标温度越高, 越有利于测距定位的结论。结果表明: 对于1000K以上的目标, 选择0.75～3/3～5μm这两个大气窗口作为工作波段, 在20km以内都可很好地实现测距定位; 对于500K以下的物体, 即使在5km的范围内, 测距定位效果也较差。

Abstract:

When the infrared radiation of an object transmits through the air, its extinction quantity can be described by the extinction-coefficient which differs with different wavelengths. So the ratio of two different bands radiation energy will change according to the distance. Based on this law, the infrared double-color mono-station passive positioning method for cooperative targets and non-cooperative targets was designed and proved by example calculations. The analysis was performed on the influences of the targets temperature and the extinction-coefficient difference on the positioning performance, and it shows that higher targets temperature brings better positioning effect. Calculations show that the passive positioning method using 0.75～3/3～5μm as the working bands is effective while the target is nearer than 20km and hotter than 1000K and the method is not good enough when the targets' temperature is below 500K.