Experimental investigation of the scattering of microwave signals by spheres moving at hypersonic velocity

Details Experimental investigation of the scattering of microwave signals by spheres moving at hypersonic velocity Experimental investigation of the scattering of microwave signals by spheres moving at hypersonic velocity

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981izssr..16..188b&link_type=abstract

(Akademiia Nauk SSSR, Izvestiia, Mekhanika Zhidkosti i Gaza, May-June 1981, p. 188-190.) Fluid Dynamics, vol. 16, no. 3, Nov. 19

Physics

Fluid Dynamics

Backscattering, Ballistic Ranges, Hypersonic Speed, Meteorites, Microwave Scattering, Space Plasmas, Atmospheric Ionization, Chemical Reactions, Reaction Kinetics, Shock Layers, Signal Measurement, Wave Scattering

Scientific paper

The scattering of radio waves by meteorites moving in the atmosphere at hypersonic velocity is significantly changed by the formation of an ionized shock layer. The flow of the gas in the shock layer is characterized by ablation of the mass of the body and complicated chemical kinetics, which makes it difficult to calculate theoretically the signal scattered by the plasma and leads to the need for an experimental study of the phenomenon, particularly in ballistic ranges. The methods of head-on or inclined probing of ballistic models by microwave signals have been developed furthest. The present work was aimed at creating a method for measuring the backward scattering of radio waves by models moving at hypersonic velocity in a ballistic range. The results are also given of an investigation into the influence of the ionized gas on the amplitude of the reflected microwave signals.

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