Research on lidar visibility measurement system for airport

Aiming at the difficulty in measuring the slant visibility in civil aviation airport, a solution of lidar visibility measurement system is proposed. Semiconductor laser with low pulse energy and high pulse repeat frequency while photodiode detector with the characteristics of low noise and high quanta efficiency have been adopted, which ensure the stability of system works. By using two scanning modes, the flexibility and the measurement accuracy of the system are improved. Experimental results show that the measurement accuracy of the system is better than 20%, which satisfy the requirements of International Civil Aviation Organization.