default Sonobuoy Placement for Optimal Multistatic Detection and Localization

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Sonobuoy Placement for Optimal Multistatic Detection and Localization. NURC-FR-2006-020. October 2006.

This report studies optimal multistatic sensor placement strategies.  Our sensor placement approach specifically reflects operational objectives, through the choice of the target trajectory set.  In particular, the results illustrated in this report focus on the barrier (or port area protection) scenario.  We focus on two multistatic surveillance networks of interest; the first (one source and three receivers) is motivated by the experimental multistatic system available at NURC (the DEMUS system), while the second (two source and two receivers) provides comparison with a network with the same number of sonobuoys.  We study optimal placements in the FM-only case, the CW-only case, and the combined FM-CW case.  Optimal placements are consistent with our intuition, thus validating our placement methodology and its use as a placement aid in more complex scenarios where intuition is challenged.  The report leverages previous localization analysis and signal excess modelling conducted at NURC, for both FM and CW waveforms.  Our key contributions here include the development of an information-based optimization metric, its evaluation over target-trajectory sets rather than over conventional grid-point sets, and a careful accounting for multistatic issues including direct blast blanking.  In future work, we plan to compare actual tracking performance based on optimal sensor placements with performance based on sub-optimal placements.