Matched field range and depth resolution in range-dependent waveguides

Abstract

Estimates of range and depth resolution are required in order to determine computational grid spacings for matched field processing (MFP). In this paper it is shown how previous results for range-independent waveguides can be extended to account for range dependence by using standard adiabatic formulations. Significant differences in MFP resolution are observed for up-slope versus down-slope propagation due to changes in the path-integrated attenuation loss. MFP resolution is set by multipath interference lengths, so resolution estimates also relate to expected spatial scales for transmission loss fading. © 2005 Acoustical Society of America.