Abstract: A detection system will detect and identify self-propelled objects, such as missiles, which create a hot exhaust plume. The exhaust plume has radiation which flickers with a frequency range of interest. This frequency range can be detected with various detectors, such as an ultraviolet detector or radio frequency detector. A warning signal will indicate if frequencies are encountered within the frequency range of interest. The detecting system will also detect light and radio frequency radiation from pressure waves created by supersonic components of the flying object. This radiation has low frequency components which can be filtered and identified.

Abstract: A detection system will detect and identify self-propelled objects, such as missiles, which create a hot exhaust plume. The exhaust plume has radiation which modulates with a frequency range of interest. This frequency range can be detected with various detectors, such as an infrared detector, an ultraviolet detector, or even a radio frequency detector. Guided missiles have radiation frequencies which are much higher than the radiation frequencies of jet aircraft and of reciprocating engines. A filter will filter the output signals from the detector, and discard those outside of the frequency range of interest. A warning signal will indicate if frequencies are encountered within the frequency range of interest.