Developments in modelling the use of infrared offboard countermeasures in an infrared anti-ship missile scenario.

Abstract

This work deals with the evolution of a FORTRAN simulation written by Naval Research Laboratory which ic used to evaluate the effectiveness of deploying ship-launched infrared decoys to counter the anti-ship infrared seeking missile threat. Although the model (referred to as the Stochastic Infrared Engagement Model - SIREM) possesses extensive analytical capability and flexibility, refinements are desired to more accurately emulate atmospheric effects on the acquisition process. Methods are derived This work deals with the evolution of a FORTRAN simulation written by Naval Research Laboratory which ic used to evaluate the effectiveness of deploying ship-launched infrared decoys to counter the anti-ship infrared seeking missile threat. Although the model (referred to as the Stochastic Infrared Engagement Model - SIREM) possesses extensive analytical capability and flexibility, refinements are desired to more accurately emulate atmospheric effects on the acquisition process. Methods are derived herein to calculate atmospheric transmittance as a function of range using an accurate, LOWTRAN-based empirical formula. Basic seeker discrimination techniques are addressed which may be incorporated into SIREM or other simulations for future missile-versus- decoy evaluations; and some ideas are presented which may prove valuable in decoy enhancement to subjugate the discriminating seeker.