Geo-acoustics Inversion Toolbox (GAIT) Development for Tactical Environmental Characterization

"Rapid, robust, accurate predictions of acoustic performance are asubstantial fleet need. Acoustic sensitivity to environmentalparameters and the difficulty of measuring them pose asignificant problem to acoustic performance prediction. In PhaseI, ORINCON developed the Rapid Geo-acoustic Characterization(RGC) algorithm that determines features of the acoustic fieldrelevant to the ASW problem (transmission loss, time spread,striations). This initial estimate can be used tactically inTDAs. A tactical tool that estimates the environment from insitu measurements would be valuable to all Navy platforms workingthe ASW problem (submarines, surface ships, IUSS, air).In Phase II, ORINCON will develop a prototype system, the Geo-acoustics Inversion Toolbox (GAIT), to perform real-timeenvironmental inversions. Initial estimates from the RGCalgorithm will be coupled to state-of-the-art global optimizationalgorithms, which have been shown to determine geo-acousticparameters accurately. Inversion results will be implemented inthe TEDS database. Phase II objectives include: (1) expansionand development of RGC algorithms developed in Phase I; (2)analysis of multiple modes of data (active, passive); (3)identification and testing on data sets relevant to sponsors; and(4) coding and implementation of a prototype system, includingprocessing for both RGC and Full Search (FS).BENEFITS: The proposed system has utility in a wide range of commercial an