RAYTRACINGFORATMOSPHERIC ACOUSTICWAVES USINGA HYBRIDCOMPUTER

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.