Strategic and Tactical missile detection require basically two functions. One of these functions is that the detection of the missile being launch and the burning fuel from the propellant during the acceleration into ballistic trajectory. The other will be the tracking of the missile on where it is targeted.
Normally, strategic and tactical missile launch detection and tracking systems use infrared surveillance techniques that employed by satellite sensors.
Satellite sensors are required to view the entire whole earth at one time, because the missiles could be launched from any location at any time. Furthermore, it is a must for the satellites sensors to detect where the missile probably going and, from the trajectory, to find where the missile would preferably hit with a high proba
bility detection.
Many known missile detection systems sense
infrared radiation in a single band. This band contains information about the missile as well as unwanted background. On the other hand, the composite signal contains actual, but weak, target signals which are less than the threshold over a portion of the detection band. It is to say that, when the threshold level is raised too high, many actual targets would remain undetected, that would cause a false alarm due to false detection.
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