Abstract: In the modern air defense operation, the smoke equipment should be prepositioned timely and rapidly, and the shielding effectiveness of smokescreen should be maximized. The analytic geometry and numerical analysis methods are applied to the research on the position disposition. A calculation model of smoke scale and location is established by using the analytic geometry according to the three-dimensional battlefield space and smoke demand, and a calculation model of single point smoke laying is established by using the mathematical derivation and Newton down-hill method based on the smoke diffusion model—Gaussian plume mode. And finally, a calculation model of multi-point smoke laying, viz., the anti-aircraft smoke equipment position disposition model for IR guided weapons, is established by taking the single point smoke laying as constituent unit and the smoke demand as final standard. The comparison between the calculated and test results show that the calculated results are in good agreement with the test results. Key

Key words: smokescreen, airdefense, positiondisposition, Gaussianplumemode, infraredshielding