Studying on High-altitude cirrus clouds become an important part of the research of remote sensing and meteorological as its effects on the transmission of infrared radiative.In this paper

the Mie scattering theory and the FDTD method are used to calculate the single-scattering phase function with ice particles and cirrus clouds in the bands of 2.14 μm and 3.72 μm.And the influence of size distributions

percentages of ice crystals

wavelengths

and the average effective radius on phase function for mid-latitude cirrus clouds are discussed.The results show that the effective radius and wavelength have an important influence on phase function of cirrus clouds

and the impact of the cirrus ice crystal composition and the size distribution is not significant.