Air Force Institute of Technology The AFIT of Today is the Air Force - PowerPoint PPT Presentation

Air Force Institute of Technology The AFIT of Today is the Air Force of Tomorrow. Optimization of the Progressive Multi-Channel Correlation Algorithm for Infrasound Nuclear Treaty Monitoring Anthony Runco, 2Lt, USAF James Louthain, Lt Col, PhD, USAF Dean Clauter, PhD Air University: The Intellectual and Leadership Center of the Air Force 1 Aim High…Fly - Fight - Win

Ground Truth Set Stations The AFIT of Today is the Air Force of Tomorrow. Air University: The Intellectual and Leadership Center of the Air Force 2 Aim High…Fly - Fight - Win

What is PMCC? Correlation Detector Relations The AFIT of Today is the Air Force of Tomorrow. • Closure Relation • Consistency Threshold [1] Air University: The Intellectual and Leadership Center of the Air Force 3 Aim High…Fly - Fight - Win

What is WinPMCC? Consistency-Satisfied Detections The AFIT of Today is the Air Force of Tomorrow. Air University: The Intellectual and Leadership Center of the Air Force 4 Aim High…Fly - Fight - Win

What is WinPMCC? Family-Building Process The AFIT of Today is the Air Force of Tomorrow. Air University: The Intellectual and Leadership Center of the Air Force 5 Aim High…Fly - Fight - Win

Family Building Process Threshold to Determine Families The AFIT of Today is the Air Force of Tomorrow. Air University: The Intellectual and Leadership Center of the Air Force 6 Aim High…Fly - Fight - Win

Consistency Threshold and the Receiver Operating Characteristic The AFIT of Today is the Air Force of Tomorrow. How does varying the consistency threshold affect detector performance? [2] Air University: The Intellectual and Leadership Center of the Air Force 7 Aim High…Fly - Fight - Win

Establishing a Ground Truth (GT) Set The AFIT of Today is the Air Force of Tomorrow. • WinPMCC • InfraMonitor • Stephen Arrowsmith and Rod Whitaker • Los Alamos National Laboratory • SeaTools • FK Trend • Air Force Technical Applications Center (AFTAC) Air University: The Intellectual and Leadership Center of the Air Force 8 Aim High…Fly - Fight - Win

Consistency Threshold and the Receiver Operating Characteristic The AFIT of Today is the Air Force of Tomorrow. Consistency Threshold (sec) Air University: The Intellectual and Leadership Center of the Air Force Back to Summary 9 Aim High…Fly - Fight - Win

Optimum Family Size Detection Threshold The AFIT of Today is the Air Force of Tomorrow. • Only the largest and most stable families are preserved… • Consistency: 0.1 sec [2] Air University: The Intellectual and Leadership Center of the Air Force 10 Aim High…Fly - Fight - Win

Likelihood Ratio Test The AFIT of Today is the Air Force of Tomorrow. • Likelihood Ratio Test (LRT) [3] • Ground Truth True Event Families and Non-Event Families organized by Family Size [#pixels/family] Air University: The Intellectual and Leadership Center of the Air Force 11 Aim High…Fly - Fight - Win

True Event and Non-Event Conditional PDFs The AFIT of Today is the Air Force of Tomorrow. Air University: The Intellectual and Leadership Center of the Air Force 12 Aim High…Fly - Fight - Win

Maximum A Posteriori Detection The AFIT of Today is the Air Force of Tomorrow. Back to Summary Air University: The Intellectual and Leadership Center of the Air Force 13 Aim High…Fly - Fight - Win

Bayes Approach and Risk Minimization The AFIT of Today is the Air Force of Tomorrow. C R = 0 : no SOI present, • and correctly declare one not to be C TD = 10 : SOI present, • declare SOI presence, and take action C FA = 20 : no SOI • present, but declare one to be C MD = 100 : SOI present, • but declare one not to be Back to Summary Air University: The Intellectual and Leadership Center of the Air Force 14 Aim High…Fly - Fight - Win

Optimum Threshold ROC Comparison The AFIT of Today is the Air Force of Tomorrow. Back to Summary Air University: The Intellectual and Leadership Center of the Air Force 15 Aim High…Fly - Fight - Win

Summary of Research Contributions: Monitoring Agency and Analyst Perspectives The AFIT of Today is the Air Force of Tomorrow. • Ground Truth Set – Could be tailored to infrasound stations • PMCC Algorithm • Consistency Threshold and ROC Curve Analysis • Consistency Threshold and the Receiver Operating Character... • Optimum Family Size & Detection Threshold • Maximum A Posteriori Detection • Bayes Approach and Risk Minimization • Optimum Threshold ROC Comparison Air University: The Intellectual and Leadership Center of the Air Force 16 Aim High…Fly - Fight - Win

References The AFIT of Today is the Air Force of Tomorrow. [1] Y. Cansi and A. Le Pichon, "Infrasound Event Detection Using the Progressive Multi-Channel Correlation Algorithm," in Handbook of Signal Processing in Acoustics, New York, Springer, 2008. [2] A. Le Pichon and Y. Cansi, "Progressive Multi-Channel Correlation: Technical Documentation," CTBTO, 2003. [3] B. Sklar and P. K. Ray, Digital Communications: Fundamentals and Applications, New York: Pearson, 2009. Air University: The Intellectual and Leadership Center of the Air Force 17 Aim High…Fly - Fight - Win

The AFIT of Today is the Air Force of Tomorrow. Questions? Air University: The Intellectual and Leadership Center of the Air Force 18 Aim High…Fly - Fight - Win