TREX13 Transmission Loss and Sea Floor Scattering Analysis Modeling
Abstract
This effort invovles analysis and modeling of the transmission loss data from the Target and Reverberation Experiment 2013 (TREX 2013). There is an unexpected distribution of energy in the received spectrum on the towed array between positive and negative Doppler shifts, which is possibly due to propagating modes and bistatic scattering near the array. The analysis also will applied to reverberation source data to examing how the transmission loss evolves with changing environmental conditions over the course of the experiment."The proposed three-year effort seeks to analyze and model the transmission data collected on theScripps vertical line arrays (VLAs) over the course of the Target and Reverberation Experiment2013 (TREX13). This analysis will focus on two sets of measurements: the towed sourcetransmission data and the reverberation source transmission data. Preliminary analysis of thetowed source data found that in addition to the expected Doppler shift in the frequency of thereceived narrow-band signal, there was also an unexpected distribution of energy in the spectrumbetween the positive and negative Doppler shifts. It is posited that this frequency spread is due tothe Doppler shifts associated both with the propagating modes and with bistatic scattering nearthe array. The goal of the proposed work is to examine this hypothesis and exploit this effect toimprove our understanding of both transmission loss and seafloor scattering at the TREX13 site.The results of this analysis will then be applied to the reverberation source data to examine howthe transmission loss evolves with changing sea surface and water column conditions over thecourse of the experiment.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Sep 30, 2016
- Source ID
- N000141612999
Entities
People
- Brian T. Hefner
Organizations
- Office of Naval Research
- United States Navy
- University of Washington