Abstract: In this paper, the theory of similarity and dimensional analysis are used for the scaling measurements of EOS of lossy targets'. Scaling calculation formulas between the prototype and models have been derived. By means of these formulas, the EOS of the prototype can be inferred precisely from the measured values of models, even though they do not meet the condition of physical similarity.

Key words: lossy target, radar cross section, scaling calculation, theory of similarity, dimensional analysis