diff --git a/QtPyLoT.py b/QtPyLoT.py
index c3e01ac7..2e19f840 100755
--- a/QtPyLoT.py
+++ b/QtPyLoT.py
@@ -74,7 +74,7 @@ from pylot.core.util.connection import checkurl
 from pylot.core.util.dataprocessing import read_metadata, restitute_data
 from pylot.core.util.utils import fnConstructor, getLogin, \
     full_range, readFilterInformation, trim_station_components, check4gaps, make_pen, pick_color_plt, \
-    pick_linestyle_plt, identifyPhase, loopIdentifyPhase, remove_underscores
+    pick_linestyle_plt, identifyPhase, loopIdentifyPhase, remove_underscores, check4doubled
 from pylot.core.util.event import Event
 from pylot.core.io.location import create_creation_info, create_event
 from pylot.core.util.widgets import FilterOptionsDialog, NewEventDlg, \
@@ -1377,7 +1377,9 @@ class MainWindow(QMainWindow):
         wfdat = self.data.getWFData()  # all available streams
         # remove possible underscores in station names
         wfdat = remove_underscores(wfdat)
+        # check for gaps and doubled channels
         check4gaps(wfdat)
+        check4doubled(wfdat)
         # trim station components to same start value
         trim_station_components(wfdat, trim_start=True, trim_end=False)
         self._stime = full_range(self.get_data().getWFData())[0]
diff --git a/autoPyLoT.py b/autoPyLoT.py
index cadf9eb8..62a47525 100755
--- a/autoPyLoT.py
+++ b/autoPyLoT.py
@@ -26,7 +26,7 @@ from pylot.core.util.dataprocessing import restitute_data, read_metadata
 from pylot.core.util.defaults import SEPARATOR
 from pylot.core.util.event import Event
 from pylot.core.util.structure import DATASTRUCTURE
-from pylot.core.util.utils import real_None, remove_underscores, trim_station_components, check4gaps
+from pylot.core.util.utils import real_None, remove_underscores, trim_station_components, check4gaps, check4doubled
 from pylot.core.util.version import get_git_version as _getVersionString
 
 __version__ = _getVersionString()
@@ -242,6 +242,7 @@ def autoPyLoT(input_dict=None, parameter=None, inputfile=None, fnames=None, even
             wfdat = remove_underscores(wfdat)
             # trim components for each station to avoid problems with different trace starttimes for one station
             wfdat = check4gaps(wfdat)
+            wfdat = check4doubled(wfdat)
             wfdat = trim_station_components(wfdat, trim_start=True, trim_end=False)
             metadata = read_metadata(parameter.get('invdir'))
             corr_dat = None
diff --git a/pylot/core/util/utils.py b/pylot/core/util/utils.py
index 70c73f0c..c51f6599 100644
--- a/pylot/core/util/utils.py
+++ b/pylot/core/util/utils.py
@@ -630,6 +630,31 @@ def check4gaps(data):
     return data
 
 
+def check4doubled(data):
+    '''
+    check for doubled stations for same channel in Stream and take only the first one
+    :param data: stream of seismic data
+    :return: data stream
+    '''
+    stations = get_stations(data)
+
+    for station in stations:
+        wf_station = data.select(station=station)
+        # create list of all possible channels
+        channels = []
+        for trace in wf_station:
+            channel = trace.stats.channel
+            if not channel in channels:
+                channels.append(channel)
+            else:
+                print('check4doubled: removed the following trace for station {}, as there is'
+                      ' already a trace with the same channel given:\n{}'.format(
+                    station, trace
+                ))
+                data.remove(trace)
+    return data
+
+
 def get_stations(data):
     stations = []
     for tr in data: