Deviation Measurement Method for Shooting Test at Sea Based on Intersection Photography

The fall point deviation is one of the important parameters for evaluating the hitting effect of gun weapons. Aerial photography is used to measure the fall point deviation in sea trial, however this measurement method requires helicopter or unmanned aerial vehicle(UAV) to carry measurement equipment, and requires survey ship to deploy several auxiliary buoys in the predicted area for completing the parameter measurement. Accordingly, the organization and implementation of this method get into difficulty, high measurement risk, and high cost. This paper proposes a measurement method for the fall point deviation in the visual range in shooting test considering the factors mentioned above. According to the principle of intersection photography, two-position-on-same-platform photography ranging formula is deduced, and the correctness of this method is verified by experimental data. The feasibility and convenience of this measurement method are proved in sea trial. This method does not need additional measurement platform, uses less military force and saves test cost. It may serve as a reference for assessment of the same type sea trial or shooting test