| Abstract: | A signal detector and analyzer algorithm was described by Murdock and Hutt in 1983. The algorithm emulates the performance of a human interpreter of seismograms. It estimates the signal onset, the direction of onset (positive or negative), the quality of these determinations, the period and amplitude of the signal, and the background noise at the time of the signal.
The algorithm has been coded in C language for implementation as a ‘blackbox‘ for data similar to that of the China Digital Seismic Network. A driver for the algorithm is included, as are suggestions for other drivers. In all of these routines, plus several FIR filters that are included as well, floating point operations are not required. Multichannel operation is supported.
Although the primary use of the code has been for in-house processing of broadband and short period data of the China Digital Seismic Network, provisions have been made to process the long period and very long period data of that system as well. The code for the in-house detector, which runs on a mini-computer, is very similar to that of the field system, which runs on a microprocessor.
The code is documented. |
| Genre: | USGS Numbered Series |
| ProdID: | 20224 |
| Citation Author: | Murdock, James N.; Halbert, Scott E. |
| Citation Contributing Office: | USGS Albuquerque Seismological Laboratory |
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| Citation Day: | 30 |
| Citation Edition: | - |
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| Citation Language: | ENGLISH |
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| Citation Month: | Apr |
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| Citation Phsyical Description: | viii, 130 p. |
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| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Open-File Report |
| Citation Series Code: | OFR |
| Citation Series Number: | 87-158 |
| Citation Search Results Text: | A C Language Implementation of the SRO (Murdock) Detector/Analyzer; 1991; OFR; 87-158; Murdock, James N.; Halbert, Scott E. |
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| Citation Year: | 1991 |
| Type: | citation/reference |
| Text: | A C Language Implementation of the SRO (Murdock) Detector/Analyzer; 1991; OFR; 87-158; Murdock, James N.; Halbert, Scott E. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/of/1987/0158/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/of/1987/0158/report.pdf |
| URL (DOCUMENT): | http://earthquake.usgs.gov/regional/asl/pubs/files/ofr87-158.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | Geological Survey (U.S.) |
