Abstract: A missile or other smart munitions simulator uses an analog function simuor to simulate the detector signal of the missile's optical tracking components. The analog function simulator stores convoluted scene data for respective ranges between the missile and the `target` it is tracking. The scene data are stored in respective data matrices, and may correspond to the target itself or to the background. Depending on the value of variables produced during the missile tracking simulation, the analog function simulator accesses elements in the data matrices and interpolates between them, thereby producing an analog signal which simulates the detector signal of the missile's optical tracking components.