This SBIR project will demonstrate the feasibility of a tracker-in-the-loop simulation system that will perform real time evaluation of conically scanned detector array trackers in a laboratory environment. Our work will define, design, and demonstrate the feasibility of an evaluation system that will generate a real time image consisting of target, background, countermeasures, and noise components. This image will be used to evaluate a user developed scanned array based tracker design. The workincludes definition and modeling of the image components, the free gyro, and the detector array parameters. Additionally, the outer loop effects of the relative missile-to-target flight geometry will be included to provide dynamic control of the image.