.96-style 122mm Howitzer Firing Table Trajectory Data Processing

122mm Howitzer Type PL-96 is a new artillery weapon equipped in our army recently.It has various advantages such as high accuracy, long range,etc, and shows the inevitable tendency for towed artillery development under modern condition. For raising up the immediate responsive ability of the howitzer, accelerating the forming of its combat effectiveness, it is necessary to develop some relating automation software such as the program for firing data calculator of the howitzer. The mission is a newproblem that every unit has to face when the new weapons arrive. Ballistic data processing in the firing table is thd early stage and an essential part of the effort to develop the firing data calculator program for 122mm Howitzer Type PL-96. This paper starts with establishing ballistic model and discusses the most popular 4 degree of freedom ballestic model theory which is used widely external and internal, as well as the related knowledge.to obtain fitted polynomial. The article gives the partial results of ballistic basic data and adjust data calaulated by 4 degree offreedom ballistic model in the firing table for 122mm Howitzer Type PL-96. Based on these data, the paper obtains some fitted polynomial coefficients with least spuare method for the basic data and adjust data in all altitudes, full range, allcharge numbers for high and low angles fire, and compares them with those data in firing table in accuracy.The 4 degree of freedom ballistic model used by this paper is the most popular one used by various activities and organizations, including NATOaround t world, and adopted extensively in the command system and firing control system in our military. The ballistic model theory will further develop and be applied along with the further developing of aerodynamics. The application of the ballistic model could be discussed by successor. The paper refers some former experience in the fitted polynomial' s form, and makes certain modifications according to the features of the gun, that provides certain references to act on the following development.