红外双波段单站被动测距算法研究

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3.4～5 μm、8～12 μm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。

IR passive mono-station ranging algorithm using dual-band radiation

A mono-station passive ranging algorithm using dual-band radiation based on the U.S. Navy infrared transmission model is established. On the supposition that the remote target is a dot source with constant radiation intensity in several continuous observation times, combining with the U.S. Navy model, the relational expression of a target′s irradiance detected at 3.4～5 μm and 8～12 μm via the distance from a detector to the target itself is derived. The analysis shows that four transcendental equations such as lnx+bx+c=0 can be obtained at two adjacent detecting distance, and then, the detecting distances can be gained by solving those four equations. The whole coefficients at the Huanghai Sea and the East China Sea based on the U.S. Navy model are also given. At last, it′s illustrated by the theoretic ranging error curve that the relative ranging error is less than that of the irradiance measurement.