title: Bottom parameter behavior in shallow water.
abstract: This paper discusses the matched field processing behavior of key geoacoustic parameters as a function of frequency (25-100 Hz), range (250 m-2 km), and sediment layer thickness (12, 22, 40 m with scenarios corresponding to possible Shallow Water'06 tests) in a systematic manner for simulated data. It considers ideal, as well as approximate knowledge of other conditions, such as source depth, phone depth, and an ocean sound-speed profile. Some of these approximations cause more trouble than others, but they are all still manageable at the low frequencies and short ranges of interest here. A single layer sediment is always assumed here, as is a vertical array and range independence. However, the approach is easily adaptable to other situations. Finally, we introduce a new way of processing broadband information and find that averaging over all available frequencies and ranges may not be optimal for maximizing sensitivity to, e.g., finding, geoacoustic parameters.
authors.affiliation: ATolstoy Scientific, Inc. 1538 Hampton Hill Circle, McLean, Virginia 22101, USA. atolstoy@ieee.org
authors.forename: A
authors.initials: A
authors.lastname: Tolstoy