CTBT: Science and Technology Conference 2025 - SnT2025

Infrasound source position by using an over-wavelength sensor array

P3.5-600

Not scheduled

20m

Zeremoniensaal

E-poster T3.5 Analysis of Seismic, Hydroacoustic and Infrasound Monitoring Data P3.5 Analysis of Seismic, Hydroacoustic and Infrasound Monitoring Data

Speaker

Mr Yang Yichun (Beijing Great Wall Institute of Metrology and Testing Technology, China)

Description

To study impulse sound of shell explosion position in a far field over 5km even for nuclear explosion’s position. One new way was designed to perform clear spot image of source position with accurate result, that is a reverse beam-forming of burst pulse sound, Meanwhile, time-delay variance is used to estimate source’s coordinates and sound’s average velocity suggested the sound’s propagation is unchanging in its path. Simulation was made to check algorithm’s stability in a 6km area with random distributed 66-sensor array with spacing over 100m, A low side lobe result was obtained. After that, a 30-sensor infrasound array with over 10kPa detection range was created in a 5km shooting field with spacing over 20m to detect explosion impulse sound, position result is quite good with error less than 5m.