What is the mathematical model to calculate the infrared signal attenuation due to large particles?

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Maged Esmail

Dear Amr. Thank you for your comment. The paper you refereed has not mathematical model. It is just simulation.

Dear Amr

Thank you for your comment. The paper you gave gives a model for dust attenuation in millimeter wave where the wavelength is lager than the particle size. My case is different, the wavelength is shorter than the particle size, so this model does not working.