The transmission of infrared and microware is influenced by the intensity of atmospheric turbulence,while the turbulence is scaled with the refractive index structure parameter.The parameters are quite different for infrared and microware band.Refractive index calculation and simulation are made in this paper.Some useful conclusions are presented.Under the same situation,the refractive index structure parameter for optical band is much stronger the that for microwave band.Different wavelengths of the optical band have similar structure parameter.Difference exists but it′s small.