DIFFERENTIAL DOPPLER AS A DIAGNOSTIC

Differential Doppler compression and travel time of individual peaks i n the arrival sequence (relative to an overall average) are measured f or the 5500-km acoustic transmissions from a moving source at Heard Is land to Christmas (Crab) Island, The differentials cannot be explained by simple adiabatic propagation models. A hybrid theory, coupling pol ar and temperate models at the Antarctic Front, can account for some o f the qualitative features. Differential Doppler could be a useful too l for identifying ray arrivals.