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建立了基于美国海军红外传输模型的双波段单站被动测距算法。在若干相连观测时刻,远处目标被假定为具有恒定辐射强度的点源,结合美国海军模型在3.4～5μm、8～12μm波段上,得到了目标辐照度与探测距离的关系式。分析表明,在相邻两个探测距离上可得到四个形如lnx+bx+c=0的超越方程,通过求解即可获得相应的目标距离。给出了黄海、东中国海区的美国海军红外辐射传输模型的全部系数。最后,给出了文中算法的理论误差曲线,分析表明该测距误差小于辐照度的测量误差。
A dual-band single-station passive ranging algorithm based on the US Navy’s infrared transmission model was established. At several consecutive observation times, the distant target is assumed to be a point source with a constant radiation intensity. The relationship between the target irradiance and the detection distance is obtained on the 3.4 ~ 5μm and 8 ~ 12μm bands of the US Navy model. The analysis shows that four transcendental equations of the form lnx + bx + c = 0 can be obtained on two adjacent detection distances, and the corresponding target distance can be obtained by solving. The full coefficients of the US Navy infrared radiation transmission model in the Yellow Sea and East China Sea are given. Finally, the theoretical error curve of the algorithm is given. The analysis shows that the ranging error is less than the measurement error of irradiance.