Аннотация:Paper presents the review of experimental data on the measurements of radiativecharacteristics of shock waves as well as comparison of measurements of nonequilibriumspectral radiation of shock-heated N2-O2 and CO2-N2 gas mixtures with the results ofnumerical simulations. The experimental results on the absolute measurements ofnonequilibrium spectral radiation were obtained on the shock tubes of Laboratory ofKinetic Process in Gases of Institute of Mechanics MSU. The numerical nonequilibriumspectral features of the shock-heated gases in absolute units were obtained using the modelof nonequilibrium radiation emitted in the relaxation zone.