Non-GPS Sonobouy Positioning System

The Phase II implementation of the Sonobuoy Location System (SLS) utilizes existing sonobuoy RF signals to estimate the buoy positions. Using the techniques developed in Phase I, simulation of the SLS algorithm has provided sonobuoy position estimates well within the 100 yard accuracy requirement. All of the Phase I tactical simulations have demonstrated this sonobuoy position estimation accuracy for aircraft standoff monitoring ranges out to 50nm or out to the sonobuoy RF line of sight . The Phase II SLS includes the design and implementation of the Phase I SLS producing a flight capable prototype that: • Automatically accepts aircraft navigation data • Provides real-time data acquisition / processing of sonobuoy RF signals • Automatically accepts sonobuoy deployment / hand off data • Provides sonobuoy position estimates / CEP data for all deployed sonobuoys • Provides an operator station to control / monitor the SLS