大气中激光到达角起伏引起跟踪系统角误差的研究

为研究大气结构常数、湍流特征尺度、跟踪距离以及接收孔径对激光跟踪系统角精度的影响，采用同时包含湍流内尺度和外尺度影响的综合湍流谱对大气湍流中激光到达角起伏引起的激光跟踪系统角误差进行了数值模拟。结果表明：激光跟踪系统测角精度与系统接收孔径大小有关，并随大气结构常数和跟踪距离的增大而降低；湍流内尺度和外尺度仅在有限范围内影响跟踪系统角精度。分析结果可为系统设计提供参考。

Effect of Angle-of-Arrival Fluctuation on Angle Precision of Laser Tracking System

Based on the integrated power spectral density of refractive-index fluctuations including the influence of inner-scale and outer-scale, the angle error of laser tracking system induced by angle-of- arrival （A-O-A） fluctuation is numerical simulated. The effects of turbulence scale, refractive-index structure constant, tracking distance and receiver aperture diameter on precision of laser tracking system are analyzed. The results indicate that the angle precision of tracking system relates with aperture diameter, and decreases with the refractive-index structure constant and propagation distance increasing, which can he useful in designing and optimizing laser tracking system.