RAYTRACINGFORATMOSPHERIC ACOUSTICWAVES USINGA HYBRIDCOMPUTER
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A description ofa threedimen- sionalray-tracing programforatmospheric acoustic wavesispresented.ThemethodusesHaselgrove's equations implemented ona hybridcomputer.The programisabletoobtainray-pathsforthesewaves incomplexatmospheric modelswhicharebothaniso- tropicandnonhomogeneous. Theapproachhasthe advantages ofsimplicity, lowcost,an accuracy morethansufficient foravailableatmospheric modelsandan interactive capability wherebyre- sultsareavailableatonceandmaythusbeused to selectparameters forsucceeding runs. Sample resultsarealsogiven.