Automatic Array and Network Detection in the Presence of Signal Variability
TELEDYNE GEOTECH ALEXANDRIA VA SEISMIC DATA LAB
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Earlier theoretical work on automatic detection by an array or a network of arrays is extended to include the case where the signal amplitude varies log-normally between sensors or arrays. It was found that a multi-array detector which detects on the sum of the subsystem detector outputs is substantially superior to a voting detector. This result is in agreement with the few available empirical data. It is recommended that the multi-array detector be further evaluated using empirical data with a view to its use in worldwide networks and in arrays with widely spaced subarrays. Several other results are obtained which show that existing techniques for evaluating network thresholds are accurate for automatic detectors.
- Seismic Detection and Detectors