EMP Data Processing, Time Tying, Data Quality, and Data Conditioning

An adaptive time delay of arrival (TDOA) technique has been implemented to automatically determine the proper time alignment of EMP response data acquired using delayed digitizers. Added benefits of the procedure are the quantitative assessment of data quality and proper signal conditioning for subsequent processing. This paper describes the procedures used for time tying transient responses, develops simple data quality models based on the structure of the cross correlation and demonstrates these models using test data. A procedure for conditioning a properly recon­ structed test data set is presented.