To provide a system for identifying and monitoring the location of a sonic wave that is generated when an airplane makes hypersonic flight.

A shock wave model is stored on a database unit 11 which is used to obtain an extent of the impact of a sonic wave based on the shape of an air plane when the airplane makes hypersonic flight, the extent of the impact of the sonic wave is calculated at a calculation unit 12 based on the shock wave model stored on the database unit 11 from the flight Mach number, position angle, and position information of the airplane, and the extent of the impact of the sonic wave that has been calculated at the calculation unit 12 is displayed on a display unit 13.