A complete simulation system has been developed to perform motion table testing of IR imaging seekers. The system consists of an IR projector, an imaging system composed of a computer and a real-time graphics processor, and an integrated IR signature modeling system. The simulation system can perform both seeker-in-the-loop and open-loop simulation. The IR projector, which uses a liquid crystal light valve (LCLV), is driven by a conventional CRT and projects images in the 8-12 micron range. The off-line IR signature modeling software is completely integrated with the simulation system. It consists of (1) a geometric target modeler, (2) an interactive geometric scene editor, (3) a thermal model, and (4) an atmospheric attenuation model based on LOWTRAN 6.