Infrared detector can obtain the azimuth angle and elevation angle of the target, but it is hard to get the information of distance. Thus the obtained information of aerial target is incomplete information, and it is impossible to track the three-dimensional target effectively in rectangular coordinates. Aiming at this issue, a new approach, the algorithm of filtering and smoothing with parameters based on motional infrared mono-station, was proposed. Firstly, the direction of target flight was estimated by using the measured azimuth and elevation, the flight parameters could be calculated out by using the estimated direction vector and angle measurement arrays. And then, parameter flight path the formula for calculating the flight path was gained, thus the the estimated value of bearing and elevation could be obtained. The simulation shows that the model has a stable estimation of bearing and elevation whose error is small and the effect is fine.%红外探测器只能测量运动目标的方位角和俯仰角,难以获取目标的距离信息,所测量的空中目标信息为不完全信息,无法在直角坐标系下有效对三维运动目标进行滤波与跟踪.针对这一问题,提出红外单站跟踪运动目标的参数航迹滤波方法.该方法利用传感器测量到的目标方位角和俯仰角信息,根据假设的目标运动模型,先对目标飞行方向进行估计,然后利用估计出的方向向量和角度量测序列计算出目标的两个航迹参数；最后综合解算得到目标到传感器的方向向量参数航迹计算公式,从而得到方位和仰角估计值.仿真结果表明,该模型对方位和仰角的估计值较稳定,误差较小,效果较优.
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