Package gov.llnl.gnem.apps.coda.calibration.service.impl.processing

Class CodaSNREndTimePicker

java.lang.Object

gov.llnl.gnem.apps.coda.calibration.service.impl.processing.CodaSNREndTimePicker

All Implemented Interfaces:

EndTimePicker

@Component
public class CodaSNREndTimePicker
extends Object
implements EndTimePicker

Constructor Summary

Constructors

Constructor	Description
CodaSNREndTimePicker()

Method Summary

Modifier and Type	Method	Description
double	getEndTime(float[] waveform, double sampleRate, double startTimeEpochSeconds, int startOffset, double minLengthSec, double maxLengthSec, double minimumSnr, double noise)	Attempts to estimate a coda-end time for a given waveform.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CodaSNREndTimePicker

public CodaSNREndTimePicker()

Method Details

getEndTime

public double getEndTime(float[] waveform,
 double sampleRate,
 double startTimeEpochSeconds,
 int startOffset,
 double minLengthSec,
 double maxLengthSec,
 double minimumSnr,
 double noise)

Attempts to estimate a coda-end time for a given waveform. Has rudimentary support for spike detection and coda-slope deviations from what the physics expects to try and identify aftershocks, artifacts, or other interfering events. Generally works well between 1 and 25hz for most regions of the world but is not particularly good below 1hz.

Specified by:

getEndTime in interface EndTimePicker

Parameters:

waveform - the waveform

sampleRate - the sample rate

startTimeEpochSeconds - the start time in epoch seconds for the phase onset

startOffset - the start offset indicates where the picker should start assessment (e.g. phase onset)

minLengthSec - the minimum coda length (sec)

maxLengthSec - the maximum coda length (sec)

minimumSnr - the minimum SNR threshold

noise - the estimated noise amplitude level

Returns:

the estimated end time or the BAD_PICK value if no estimate can be made