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ABSTRACTS | ABSTRACT DETAILS

 

Author:Milton Garces
Institution:University of Hawaii, Manoa
Email:milton@isla.hawaii.edu
Authors:Milton Garces and Claus Hetzer
Abstract Title:

"PMCC analyses of signals from the North American and Pacific infrasound network"
Abstract:

We use the Progressive Multi-Channel Correlation (PMCC) detector to define the temporal and spectral characteristics of various infrasonic sources observed by diverse infrasonic array configurations. Previous work demonstrated the PMCC was not as vulnerable to aliasing as frequency-domain detectors, and it allowed recognition of coherent signals with signal to noise levels close to unity. PMCC is presently used to produce automatic bulletins of signals detected by the International Monitoring System (IMS) station I59US in Hawaii. We show the detection parameters and features for surf, storm systems, volcanic eruptions, meteors, aircraft, and the Columbia STS-107 reentry as observed by various array geometries and locations, and describe how these detection features can be used for event discrimination. Future work will concentrate on the development of an automatic, intelligent event identification algorithm that can screen the large amount of events picked by automatic detectors.
Keywords:Progressive Multi-Channel Correlation PMCC detector aliasing temporal spectral configuration coherent signals signal noise bulletin detection parameters identification automatic

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