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由于重力场、温度场、光学器件等产生波前误差,造成航空详查相机的分辨力和测量精度降低,用自适应光学钠导星信标系统对这种波前误差进行校正是一种理想的方法。通过对钠导星信标产生原理进行分析,提出了钠导星信标理论模型,并且在该模型的基础上进行了仿真实验,在实验中得到相机高度在250-400km高空时激光器最佳脉冲能量值在597-1530mJ之间,激光脉宽则在5.4-7.1ns之间,这些实验数据对实际应用有一定的参考价值。
Due to the wave field error caused by gravity field, temperature field and optical devices, the resolving power and measurement accuracy of the aircraft are reduced. It is an ideal method to correct this wavefront error by using adaptive optical sodium guide star beacon system Methods. Through the analysis of the principle of sodium guide star beacon, a theoretical model of sodium guide star beacon is proposed, and the simulation experiment is carried out on the basis of the model. In the experiment, the best pulse of laser is obtained when the camera height is in the altitude of 250-400km The energy value is between 597-1530mJ and the laser pulse width is between 5.4-7.1ns. These experimental data have certain reference value for practical application.