Target tracking apparatus and target tracking method

A target tracking method for tracking target on the water, comprising:

• periodically acquiring echo data indicating a correspondence relationship between a position in the detection area and the level of the reflected wave at which the electromagnetic wave transmitted through an antenna is reflected at the position;
• extracting one or a plurality of potential targets to be tracked based on the level of the echo data;
• calculating each fluctuation value of the potential target, based on the change in the velocity vector of the potential target calculated based on the position of the potential target acquired at each successive timing;
• determining a target to be tracked based on the fluctuation value;
• and
• tracking the target.

A non-transitory computer readable medium storing a program causing a computer to execute image process, the image process comprising:

• periodically acquiring echo data indicating a correspondence relationship between a position in the detection area and the level of the reflected wave at which the electromagnetic wave transmitted through an antenna is reflected at the position;
• extracting one or a plurality of potential targets to be tracked based on the level of the echo data;
• calculating each fluctuation value of the potential target based on the acquired echo data of the potential target acquired at each timing;
• determining a target to be tracked based on the fluctuation value;
• and
• tracking the target.