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Evidence-Based Contact Tracking E- BaCT

Evidence-Based Contact Tracking E- BaCT. Brian W. Guimond Steven Nardone. Outline. The Objective: Generate the Tactical Picture Current Technology: “The Legacy System” E- BaCT : A New Paradigm Experimental Results Conclusions. Objective. Tactical Picture. Sensor Data. Time. R Y.

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Evidence-Based Contact Tracking E- BaCT

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  1. Evidence-Based Contact TrackingE-BaCT Brian W. Guimond Steven Nardone

  2. Outline The Objective: Generate the Tactical Picture Current Technology: “The Legacy System” E-BaCT: A New Paradigm Experimental Results Conclusions

  3. Objective Tactical Picture Sensor Data Time RY Azimuth Bearing RX Transform Sensor Data into the Tactical Picture

  4. Current Technology Contact Tracking via State Estimation • Given a history of associated measurements (bearings) find the state (range, bearing course and speed) of each contact of interest. • State Estimation Methods • Extended Kalman Filter • Monte Carlo Methods (Particle Filter) • Manual Adaptive Target Evaluator (MATE) • Associated Bearing Measurement History • Contact Followers

  5. Legacy System Process • Contact Estimate β Ownship t β(ti) Associated Bearings Contact Follower State Estimate

  6. Legacy System Challenges High Bearing-Rate Contacts Crossing Contacts Intermittent Traces (Sphere Array Baffles) Splitting/Merging Traces Solution: Manual Association

  7. Evidence-Based Contact Tracking* • The Paradigm • Given a set of admissible solutions determine the aggregated evidence that supports or refutes each solution. • The Design Process • Design the Set of Admissible Solutions • Identify/Extract Features • Aggregate Features • Extract Solution and Quality Measure *B. H. Maranda and J. A. Fawcett, ”Detection and localization of weak targets by space-time integration,” IEEE J 0f Ocean Eng., vol. 16, no. 2, pp. 189-194, April 1991.

  8. Illustrative E-BaCT Processor Sensor Data Features Aggregated Features • Energy Time Admissible Solution Signal Cells Solution Extraction Bearing Bearing-Rate Admissible Solutions Speed

  9. Example 1 High Bearing-Rate Low SNR Contact Amplitude Time (min) Conical Angle (deg)

  10. Example 1: Towed Array Contact BTR Input Data Geoplot Contact Solution

  11. E-BaCT Solutions Range History Bearing History Range (kyrds) Bearing (deg) Time (sec) Time (sec) Normalized Range Rate (%/min) Bearing Rate (deg/min) Time (sec) Time (sec) Bearing Rate History Normalized Range Rate History

  12. Example 2: Towed Array Contact

  13. Example 3: Multi-Contact BTR Input Data Tactical Picture Solution Validation

  14. Summary • Evidence-based contact tracking is new paradigm for developing the tactical picture from sensor data and heuristic information. • Paradigm inherently associates data and information in time across a set of admissible solutions and thereby avoids the need for contact followers. • A prototype combat control system has been developed for processing sphere and towed array data. • Experimental designs have been extended to the wide aperture array and multisensor data processing.

  15. Thank You for Your Attention Questions?

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