In the Netherlands, a 'Large Aperture Infrasound Array' (LAIA) of microbarometers is being installed by the KNMI in the framework of the radio-astronomical 'Low Frequency Array' (LOFAR) project. LAIA will be used to apply interferometric techniques to model the atmospheric wind and temperature structure. Therefore, the crosscorrelation between the ambient noise received by the different microbarometers will be calculated. The result is a time lag, which allows to apply the interferometry to the infrasound. In this poster a model is presented, based on a raytracing approach, but which allows to determine the phase and the amplitude, as input for the interferometry. This work is carried out in collaboration with the TU Delft. Results will be applicable in the verification of the Comprehensive Nuclear-Test-Ban Treaty (CTBT).

Reference:
Julius T. Fricke, Läslo G. Evers, Dick G. Simons, Kees Wapenaar, Large Aperture Infrasound Array in the Netherlands for interferometric studies, Poster: EGU General Assembly, 2/5/2010-2/5/2010, Vienna, Austria.