Discussion on Graphic Expression of Stability of Target Motion Factors

A concept of expressing calculation results of target motion factors graphically is proposed. For a straight running target with constant velocity, the target motion factors are estimated by the one station bearing-only method with finite sound speed. A computer is used to draw a graph of recent several target estimations in terms of position, velocity, and mean square deviation of bearing observing errors. This graph may express the stability of calculation results of the target motion factors to help decision-maker sunder stand intuitively and improve decision efficiency of choosing target motion factors. It is found that the estimated properties of the mean square deviation of bearing observing errors can be used to judge target maneuver, and the judgment can be taken as a basis to reset calculation. This study may provide a reference for torpedo operational application.