initial git import of module trigger which introduces simple triggerlist

modification functionality

pylot/core/analysis/trigger.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from obspy.signal.trigger import recSTALTA, triggerOnset
+
+
+def createSingleTriggerlist(st, station='ZV01', trigcomp='Z', stalta=[1, 10], trigonoff=[6, 1]):
+    '''
+    uses a single-station trigger to create a triggerlist for this station
+    :param st:
+    :param station:
+    :param trigcomp:
+    :param stalta:
+    :param trigonoff:
+    :return:
+    '''
+    tr = st.copy().select(component=trigcomp, station=station)[0]
+    df = tr.stats.sampling_rate
+
+    cft = recSTALTA(tr.data, int(stalta[0] * df), int(stalta[1] * df))
+    triggers = triggerOnset(cft, trigonoff[0], trigonoff[1])
+    trigg = []
+    for time in triggers:
+        trigg.append(tr.stats.starttime + time[0] / df)
+    return trigg
+
+
+def createSubCoincTriggerlist(trig, station='ZV01'):
+    '''
+    makes a triggerlist with the events, that are triggered by the
+    coincidence trigger and are seen at the demanded station
+    :param trig: list containing triggers from coincidence trigger
+    :type trig: list
+    :param station: station name to get triggers for
+    :type station: str
+    :return: list of triggertimes
+    :rtype: list
+    '''
+    trigg = []
+    for tri in trig:
+        if station in tri['stations']:
+            trigg.append(tri['time'])
+    return trigg