The usage of IIR (Imaging Infrared) missile guidance systems keeps increasing due to their operational usefulness and technical capability improvement. Some of those systems improvement comes from the software capability enhancement. In this study, the approach to extend the existing IIR Guided missile system developed for the sea targets to the land targets was conducted. The land target engagement usually demands to overcome the more adverse operational environment coming from the complex ground background and occlusion.
This research is important to IIR missile developers who focus on overcoming operational environment problems, specifically to the persons who work for IIR seeker software or automatic target acquisition (ATA) algorithm enhancement. Through exploring IIR guided missile CONOPS, architecture and its operational environment, several environment problems were identified that could limits IIR seeker missile detection and tracking process against the land targets. SE process was used as the main qualitative approach to analyze the operational environment, system need and to derive the additional requirements. From this analysis the occlusion problem was selected as the most important technical issue to overcome the difficulty of land target engagement.
In order to solve the occlusion problem, software enhancement approach was chosen to satisfy the additional requirements. The dynamic feature enhancement of the seeker is proposed as a solution to reduce the tracking failure from the occluded targets in nonhomogeneous environment. MATLAB tool was used as a quantitative approach for SW algorithms simulation and testing. Tracker simulation results and failure rate was used as the evaluation criteria. Several trackers results on several IR video sequences were compared. The enhanced trackers with Kalman filter always achieved the lowest tracking failure rate by up to 93% compared to all other trackers, and better tracking performance by cumulatively ˃ 4 % compared to original SRDCF Tracker. Enhancing seeker dynamic feature allowed IR seeker system to achieve significantly more accurate tracking performance and better performance in keeping the lock-on target within its FOV even when the occlusion occurred.