1. A processor for characterizing ocean bottom parameters in real-time comprising: signal processing means for receiving navigational, environmental, and sonar data and processing said data into a reverberation energy envelope, said reverberation energy envelope being generated from an acoustic return from a sonar ping, and into blocks of time correlated data; data monitoring means, coupled to said signal processing means, for monitoring said navigational, environmental, and sonar state data and said reverberation energy envelope for changes; and model processing means, responsive to said data monitoring means, for building a set of acoustic model eigenrays, building a reference reverberation model, said reference reverberation model comprising reference reverberation as a function of time, and extracting bottom parameters by comparing said reverberation energy envelope with said reference reverberation model.