diff --git a/ETA.py b/ETA.py
index 5e1d19f..f900137 100755
--- a/ETA.py
+++ b/ETA.py
@@ -588,17 +588,17 @@ if verbose:
 bias = {
     'top':  np.mean(
         data[
-            calibrations[ 'top' ][ 'y' ][ 'min' ] - 100 :
-            calibrations[ 'top' ][ 'y' ][ 'min' ]       ,
-            calibrations[ 'top' ][ 'x' ][ 'min' ]       :
+            calibrations[ 'top' ][ 'y' ][ 'min' ]      :
+            calibrations[ 'top' ][ 'y' ][ 'min' ] - 500,
+            calibrations[ 'top' ][ 'x' ][ 'min' ]      :
             calibrations[ 'top' ][ 'x' ][ 'max' ]
         ]       ,
         axis = 0,
     ),
     'down': np.mean(
         data[
-            calibrations[ 'down' ][ 'y' ][ 'min' ] - 100:
-            calibrations[ 'down' ][ 'y' ][ 'min' ]      ,
+            calibrations[ 'down' ][ 'y' ][ 'min' ] - 500:
+            calibrations[ 'down' ][ 'y' ][ 'min' ] - 100,
             calibrations[ 'down' ][ 'x' ][ 'min' ]      :
             calibrations[ 'down' ][ 'x' ][ 'max' ]
         ]       ,
@@ -606,7 +606,23 @@ bias = {
     ),
 }
 
-mean_bias = bias[ 'down' ]
+mean_bias = sp_convolve(
+    np.mean(
+        [
+            bias[ 'down' ] ,
+            bias[ 'down' ],
+        ]       ,
+        axis = 0,
+    )                     ,
+    np.ones(
+        (
+            50,
+        ),
+    )                     ,
+    'same'                ,
+) / 50
+
+print( 'mean_bias ETA: ' + str( mean_bias ) )
 
 data[
                            :                       ,