Aircraft Plume Infrared Signature in Nonafterburning Mode

摘要

1) The spectral intensity of aircraft plume as received by an IR-guided SAM in nonafterburning mode is prominent only in the 4.15-4.20 μm band. 2) Most plume IR radiation is absorbed by the intervening atmosphere; primarily, it is the radiation emitted from the broadened wings of the plume emissive bands that reaches the detector. 3) The background radiation does not significantly affect the plume IR signature level. 4) In the nonafterburning mode, the IR signature from plume is much lower than from tailpipe and rear fuselage; especially with the use of 8-12 μm band IR detectors.