Assessment of the accuracy of the approximation of the nonlinear parameters of the projectile flight

The article evaluates the accuracy of approximation aerodynamic force coefficients (moments) projectile and atmospheric parameters, which are significantly nonlinear. 155-mm Assegai M2000 South African company Denel Naschem parameters defined by international standard ISO 2533:1975/Add.1:1985(en) Standard Atmosphere taken as basis. estimation tabular values is presented through relative error (misalignment) between given data approximated function (moments). Analytical functions used approximating functions, such sum a support (error function) set basic (Gaussian functions), makes it possible to obtain an continuously differentiated on segment change in flight parameter, can be represented single expression. In Maple software environment, analytical Gaussian functions) were tabulated forces projectile. obtained solve problems calculating firing tables, preparing using ballistic integrating algorithms (ballistic calculators) for existing, new artillery systems those being modernized. It shown that iterative procedures atmosphere, construct form continuous parameter within entire range its change, ensuring data.