Modelling Doppler sonar backscatter

This paper provides a brief description of a parametric Doppler model and demonstrates the application of the model with two examples. First presented are results from a model of the Vectron, a new Doppler implementation intended to make turbulence resolving point measurements 7 m from the instrument transducers. The second example presents results from a simulation of the Nortek Vectrino Profiler. These two examples are distinguished in that for the Vectron, acoustic backscatter for broadband Doppler must be simulated and this processing approach requires the time dilation of backscatter signals to be synthesized. The Vectrino is a pulse-to-pulse coherent instrument for which time dilation is not required however the scales of that system are such that transducer nearfield effects must be considered.