Spectral values (with 1 nm spectral resolution) of the product of γkν and γ′kν (where kν is the monochromatic coefficient of ammonia absorption and γ and γ′ are the relative (with respect to 0.85/0.15 hydrogen-helium mixture and methane, respectively)) concentrations of ammonia for the absorption bands at λλ = 552, 604, 645, 787, and 932 nm in thermal conditions of Jupiter’s and Saturn’s atmospheres are determined (http://www.mao.kiev/ua/planets/page5-e.html).