MODEL IDENTIFICATION METHOD FOR THE PREMATURE IDENTIFICATION OF EVENTS GENERATING INFRASOUND

摘要

The invention relates to a model identification method for the premature identification of events generating infrasound. According to said method, periodograms of temporally highly resolved temperature fluctuations continuously measured in a standardised manner by means of measuring instruments connected to the ground are analysed in the airglow. A so-called spectral fingerprint determined from the periodograms is compared with a so-called spectral fingerprint stored in a look-up table, of periodograms of model-based simulations of infrasound diffusion. In the event of a significant similarity between structures of the periodograms of the time series of the measured and simulated temperature fluctuations, a reverse calculation of the infrasound diffusion in the upper mesosphere down to the ground is carried out by means of an infrasound diffusion model (ray-tracing). In this way, the location of an infrasound source is determined. For a critical area potentially at risk, an infrasound diffusion is continually simulated and the characteristic so-called spectral fingerprint determined by the spectral analysis method is stored in the look-up table.