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  4. 6(87)'2010
  5. Application of powerful ultrawideband acoustic impulses in radioacoustic sounding systems

Application of powerful ultrawideband acoustic impulses in radioacoustic sounding systems

V.D. Karlov, Y.N. Ulyanov, V.L. Misaylov, N.G. Maksimova
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In the paper, possibilities of high-power wideband acoustic pulses for radioacoustic sounding systems (RASS) are analyzed. It is taken into account that at propagation of unfilled acoustic impulses, effects of their nonlinear interaction with the air do not reveal themselves. An engineering mathematical model is built for propagation of the acoustic impulse from the gun shot in the neutral atmosphere with regard of the divergence, classic and relaxation absorption of sound waves in the air, and values of the impulse front cross-section for radio waves are obtained. Cross-sections of impulse fronts are compared with those of the atmospheric turbulent inhomogeneities. The results of comparison have shown that the echo-signal from the impulse front exceeds in level the echo-signal from the turbulent atmospheric inhomogeneities. This confirms the practical realizability of such a RASS method that allows simplifying the RASS equipment, lowering its cost and decreasing its dimensions.
Keywords: radioacoustic sounding, high-power wideband acoustic pulses, nonlinear absorption of a sound in air