Robust bearing estimation for 3-component stations
A robust bearing estimation process for 3-component stations has been developed and explored. The method, called SEEC for Search, Estimate, Evaluate and Correct, intelligently exploits the inherent information in the arrival at every step of the process to achieve near-optimal results. In particular the approach uses a consistent framework to define the optimal time-frequency windows on which to make estimates, to make the bearing estimates themselves, to construct metrics helpful in choosing the better estimates or admitting that the bearing is immeasurable, and finally to apply bias corrections when calibration information is available to yield a single final estimate. The algorithm was applied to a small but challenging set of events in a seismically active region. It demonstrated remarkable utility by providing better estimates and insights than previously available. Various monitoring implications are noted from these findings.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 752011
- Report Number(s):
- SAND99-1400; TRN: US0003316
- Resource Relation:
- Other Information: PBD: 1 Feb 2000
- Country of Publication:
- United States
- Language:
- English
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Robust and intelligent bearing estimation
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Related Subjects
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
SEISMIC ARRAYS
SEISMIC EVENTS
COORDINATES
DATA ANALYSIS
PROBABILISTIC ESTIMATION
CORRECTIONS
ALGORITHMS
SEISMIC DETECTION
BEARINGS
ESTIMATION
POLARIZATION
CORECTIONS
LOCATION
ASSOCIATION