4.6.2.2.1. eqcorrscan.core.lag_calc._channel_loop¶
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eqcorrscan.core.lag_calc.
_channel_loop
(detection, template, min_cc, detection_id, interpolate, i, pre_lag_ccsum=None, detect_chans=0, horizontal_chans=[‘E’, ‘N’, ‘1’, ‘2’], vertical_chans=[‘Z’], debug=0)[source]¶ Inner loop for correlating and assigning picks.
Utility function to take a stream of data for the detected event and write maximum correlation to absolute time as picks in an obspy.core.event.Event object. Only outputs picks for picks above min_cc.
Parameters: - detection (obspy.core.stream.Stream) – Stream of data for the slave event detected using template.
- template (obspy.core.stream.Stream) – Stream of data as the template for the detection.
- min_cc (float) – Minimum cross-correlation value to allow a pick to be made.
- detection_id (str) – Detection ID to associate the event with.
- interpolate (bool) – Interpolate the correlation function to achieve sub-sample precision.
- i (int) – Used to track which process has occurred when running in parallel.
- pre_lag_ccsum (float) – Cross-correlation sum before lag-calc, will check that the cross-correlation sum is increased by lag-calc (using all channels, ignoring min_cc)
- detect_chans (int) – Number of channels originally used in detections, must match the number used here to allow for cccsum checking.
- horizontal_chans (list) – List of channel endings for horizontal-channels, on which S-picks will be made.
- vertical_chans (list) – List of channel endings for vertical-channels, on which P-picks will be made.
- debug (int) – Debug output level 0-5.
Returns: Event object containing network, station, channel and pick information.
Return type: obspy.core.event.Event