Tomographic Inversion on Multiple Receivers/Arrays from Multiple Sources for the Estimation of Shallow Water Bottom Properties
Geoacoustic inversion in even rather simplified range independent regions (but for multiple unknown parameters) is known to be quite difficult [TCB]. Additionally, inversion for even one parameter but in a range-dependent region is also quite difficult [DYOC]. As might be expected, a combination of range variability plus multiple parameters leads to an extremely difficult problem. Recent efforts have concentrated on an approach which estimates range-independent, i.e., range-averaged, parameters on individual source-receiver/array (SR) paths and then combines all the results in a matrix inversion to estimate the range-dependent region properties. This chapter is analogous to one successfully developed for the estimation of large volume ocean sound-speed profiles (as seen in [T3]). This chapter will discuss recent efforts for this new shallow water tomographic geoacoustic inversion via individual paths.
KeywordsInversion Method Tomographic Method Inversion Error Small Condition Number Bottom Parameter
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