Evaluation of IR Countermeasures (Model Methodology).
Abstract
The methodology required to synthesize, program and validate the infrared signatures of Army aircraft (notably helicopters) and simulate their interaction with reticled sensors in a computer model to obtain sensor signal to noise ratios and error signals for arbitrary mission and flight profiles is described. The signatures account for exhaust plume emission (including effects of turbine operation and rotor down wash), hot metal parts, directional emittance due to body surface temperature (via thermal balance of internal sources, aero boundary layer conduction, solar heating, nocturnal radiation and plume heating), directionally reflected ambient radiance (including direct and difuse solar, sky and cloud emission, and terrestial surface radiation). Signatures are formulated in their exact spatial distribution of radiant intensity for any spectral band from 1 to 16 microns as viewed from any aspect and LOS geometry. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 26, 1972
- Accession Number
- ADA042989
Entities
People
- J. B. Goodell
- R. C. Brown
- R. F. Higby