Passive ranging method for IRST systems

A passive ranging method for IRST systems aimed at uniform velocity point t argets was presented. Target model has been built firstly, then the range e quations set based on this model were developed. The peculiarity of this mo thed is that the velocities, ranges and radiant intensities can be worked o ut, without targets database and supposing the parameters of targets just l ike velocities, only with the angles and radiations of the targets measurd by IRST systems. The computer simulation verifies the validity of the metho d.