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1、TARGETACQUISITIONWEAPONSSOFTWARE(TAWS)IMPROVEMENTSFOROVER-WATERTARGETSCharlesP.McGrathSpaceandNavalWarfareSystemsCenter,SanDiego,Code285849170PropagationPathSanDiego,CA92152-7385ABSTRACTTheTargetAcquisitionWeaponsSoftware(TAWS)isaweatherimpacttacticaldecisionaid.TAWSwas
2、originallydevelopedbytheU.S.AirForce,buthasbeensignificantlyupgradedandadaptedtomeetArmy,Navy-Marine,andCoastGuardapplications.ThispaperdiscussesimprovingTAWSpredictionsfornavalapplicationsbyaddingthewakeeffectstoboatandshiptargets.TAWScouldnotaccuratelymodelmovingwater
3、targetspriortothisimprovementbecausewakeeffectswerenotmodeled.Anempiricallybasedcomputationalapproachistakentoaccommodatetheruntimeconstraintsofanoperationalmissionplanningsystem.WhileTAWSonlyrequiresacomputedwakecorrectionfortarget-backgroundtemperaturecontrastandappar
4、entarea,themodelisalsosuitableforscenegeneratingprogramsthatgivepilotsfly-throughandtargetpreviews.TheatmosphericeffectsofthewakemodelusethewellknownMODTRANcode,andtheradiancecalculationsusethesamemethodsastheSeaRadwaterbackgroundcodecurrentlyinTAWS.Thesebasicmodelingme
5、thodsarediscussedandresultscomparingTAWSpredictionswithradiometricfielddataarepresented.Thetopicareasincludeageneralwakemodeldescriptionandpredictionresultsfortargetdetectionandrecognitionranges,zero-rangetarget-with-wakeradiance,backgroundradiance,andapparentarea.Keywo
6、rds:TAWS,SeaRad,validation,atmospherictransmittance,remotesensing,tacticaldecisionaid1.INTRODUCTION1.1Background1TheTargetAcquisitionWeaponsSoftware(TAWS)isamissionplanningtacticaldecisionaid.TAWSpredictstheperformanceofselectedsensorsgiventheweatherforecastsandtargetin
7、gscenarios.TAWSwillcalculatedetection,recognition,identification,andlock-onrangesforsensorsinthemidandfarinfrared,visible,andlaserwavebands.TAWSwasdevelopedbytheU.S.AirForceforair-to-groundsensorperformancepredictions.TheU.S.Army,Navy,andCoastGuardhaveadoptedTAWSasacomp
8、onentoftheirmissionplanningsystemsandaremakingchangestoTAWStomeettheparticularneedsofeachservice.TheNavyisaddi
