20 June 1997 IR signature prediction errors for skin-heated aerial targets
Author Affiliations +
The infrared signature of an aircraft is generally calculated as the sum of multiple components. These components are, typically: the aerodynamic skin heating, reflected solar and upwelling and downwelling radiation, engine hot parts, and exhaust gas emissions. For most airframes, the latter two components overwhelmingly dominate the IR signature. However, for small targets--such as small fighters and cruise missiles, particularly targets with masked hot parts, emissivity control, and suppressed plumes- -aerodynamic heating is the dominant term. This term is determined by the speed of the target, the sea-level air temperature, and the adiabatic lapse rate of the atmosphere, as a function of altitude. Simulations which use AFGL atmospheric codes (LOWTRAN and MODTRAN)--such as SPIRITS--to predict skin heating, may have an intrinsic error in the predicted skin heating component, due to the fixed number of discrete sea-level air temperatures implicit in the atmospheric models. Whenever the assumed background temperature deviates from the implicit model atmosphere sea- level temperature, there will be a measurable error. This error becomes significant in magnitude when trying to model the signatures of small, dim targets dominated by skin heating. This study quantifies the predicted signature errors and suggests simulation implementations which can minimize these errors.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
John D. McGlynn, John D. McGlynn, Steven P. Auerbach, Steven P. Auerbach, } "IR signature prediction errors for skin-heated aerial targets", Proc. SPIE 3062, Targets and Backgrounds: Characterization and Representation III, (20 June 1997); doi: 10.1117/12.276690; https://doi.org/10.1117/12.276690


Hyperheat a thermal signature model for super and...
Proceedings of SPIE (October 04 2017)
Infrared signature generation of airborne targets
Proceedings of SPIE (August 12 1993)
Infrared ship signature analysis and optimisation
Proceedings of SPIE (May 24 2005)
Absolute and contrast infrared signatures from missile noses
Proceedings of SPIE (September 30 1990)
Thermal signatures of personnel in urban environments
Proceedings of SPIE (April 28 2008)

Back to Top