机载激光雷达沙尘探测能量优化配置的统计研究

依据美国ANSI标准,结合1999~2004年间地基激光雷达探测的合肥地区沙尘暴消光廓线,统计分析了机载大气探测激光雷达探测沙尘时偏振532 nm垂直通道和1064 nm通道所需的最小激光能量,模拟计算了机载大气探测激光雷达探测沙尘暴时在0~12km高度范围内不同激光束发散角和激光脉冲能量比例的532 nm和1064 nm激光脉冲眼睛安全最大阈值能量。以合肥地区沙尘暴消光特性的统计结果、地面人眼安全标准和两个"瓶颈"通道的探测能力为依据提出两种激光脉冲能量配置方案。

Statistical Study of Energy-Optimized Distribution for Sand-Dust Detection Using Airborne Lidar

The minimum laser pulse energy to detect sand-dust with the polarized 532 nm perpendicular channel and 1064 nm channel with airborne atmospheric lidar are analyzed statistically according to American ANSI standard and sand-dust extinction coefficient profiles detected by ground-based lidar from 1999 to 2004 year in Hefei area. The laser pulse eye-safety maximal energy with different beam divergence angles and energy ratio (532 nm and 1064 nm) are simulated in 0～12 km altitude is simulated for the airborne atmospheric lidar. Two laser pulse energy distribution schemes are presented according to the eye-safety standard on the ground, detection ability for two “bottle-neck” channels and statistical results of sand-dust extinction profile in Hefei.