Host: The Japanese Society for Planetary Sciences: Local Organizing Committee for 2006 Fall Meeting
The seismic networks are quite sensitive for micro ground vibration, then those networks could detect not only seismic wave generated by earthquakes, but also ground oscillation generated by coupling of meteor shockwave with the ground near a station. Last years, we analyses this kind of ground motion data recorded by seismic network, as meteor shockwave signals. For example, we estimate some grate fireball's aerial path from arrival times of shockwaves, and we estimate sizes and ablation history of some great fireball and a meteorite fall from amplitude of ground motion induced by shockwave. However, the present meteoroid size estimation method from seismic records has a weak point. The weak point due to difficulty of overpressure estimation from ground motion amplitude. To flee from this problem, we have to measure the shockwave overpressure. We work to develop infrasound observation system for meteor shockwave monitoring. The system must have following capabilities. 1) Flat response with at least 0.1 to 20 Hz. 2) At least 0.001 Pa resolution (+/- 0 to 20 Pa range). In this talk, we will report the development of meteor shockwave monitoring system and future observation plans.
