A Multichannel Processing Approach to Real Time Network Detection, Phase Association and Threshold Monitoring

This paper presents an approach to multichannel processing of data recorded by a network of stations which represents an extension of the delay-and-sum beamforming traditionally applied in array processing. A number of geographical beam-steering points are defined, and for each beam a set of time-al...

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Bibliographic Details
Main Authors: Ringdal, Frode, Kvaerna, Tormod
Other Authors: NORWEGIAN SEISMIC ARRAY (NORSAR) KJELLER
Format: Text
Language:English
Published: 1989
Subjects:
Computer Systems
*COMPUTER NETWORKS
NORTHERN EUROPE
MONITORING
NETWORKS
REAL TIME
COMPUTERS
PROCESSING
THRESHOLD EFFECTS
ARRAYS
SEISMIC DETECTION
SEISMIC WAVES
NOISE
NORWAY
ACOUSTIC FIELDS
SEISMIC ARRAYS
MULTICHANNEL
ADDRESSING
STATIONS
DETECTION
PE62714E
WUGL9A10DABH
Norway
Fennoscandia
Online Access:http://www.dtic.mil/docs/citations/ADA213940
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA213940
Description
Summary:This paper presents an approach to multichannel processing of data recorded by a network of stations which represents an extension of the delay-and-sum beamforming traditionally applied in array processing. A number of geographical beam-steering points are defined, and for each beam a set of time-aligned traces derived from the network stations are processed together so as to extract, for each step in time, a set of features corresponding to that particular beam. Applying this approach to the network of the three regional arrays NORESS, ARCESS and FINESA in Fennoscandia, we demonstrate its usefulness for associating regional phases detected at individual arrays and originating from the same event. We also give an example of application addressing the problem of continuously monitoring the seismic noise field. Keywords: Network detection; Phase association; Computer systems Threshold monitoring; Regional arrays; Computer networks. (JES)

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