基于平流层波导的次声探测能力估算方法

Estimation Method of Infrasound Detection Capability Based on Waveguide of Stratospheric

次声频率低,衰减小,传播距离远,可用于大区域事件监测/探测。次声在大气中通过波导传播,传输路径与高空大气模型有关,具有季节性特征,如果仍采用传统小范围球面扩散模型来估算次声探测范围,则会产生较大偏差。本文以Los Alamos国家实验室经验公式为基础,得到和平流层风速有关的探测距离和事件强度之间的关系,基于此关系,提出了具体的次声探测能力估算方法,并对实际数据进行了统计分析,证明了估算方法的有效性。

Infrasound can be used for large-area event monitoring/detection,for its low frequency,small attenuation and long spread distance.Infrasound spreads through the waveguide in the atmosphere,and the transmission path is related to the upper atmosphere model and has seasonal characteristics.There is a large deviation in estimating the infrasound detection range,using the traditional small-range spherical diffusion model.Based on the empirical formula of Los Alamos National Laboratory,this paper obtained the relationship between the detection distance,related to the wind speed in the stratosphere,and the event intensity.Then,estimation capability of infrasound detection method was proposed and the actual data were statistically analyzed to prove the effectiveness of the estimation method.