| 摘要 |
A source of a high speed missile is determined by detecting the shock wave generated by the passage of the missile using a plurality of blast gauges and using the amplitude and direction information from the gauges to calculate the azimuth angle of the track of the missile, the elevation of the track and the miss distance from the location of the gauges. The amplitude and direction information can also be used to calculate the velocity of the missile on at least one point along its track. The apparatus for comprises a plurality of blast gauges arranged to receive shock waves generated by the missile at different locations, a computer arranged to receive amplitude and direction data from the gauges and to perform the necessary calculations and display units for presenting the calculated information. Each blast gauge comprises a spherical fairing containing four pressure sensors whose positions on the surface of the sphere form the apices of a tetrahedron. Preferably four blast gauges are used laid out in a symmetrical three-dimensional array. The four gauges can form the apices of a tetrahedron in which one face lies in a horizontal plane. The spherical fairings are carried by tubular supports which contain the signal leads from the sensors.
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