diff --git a/network/base/scheduling.py b/network/base/scheduling.py
index 6c585bc..76a71dd 100644
--- a/network/base/scheduling.py
+++ b/network/base/scheduling.py
@@ -180,8 +180,7 @@ def next_pass(observer, satellite):
             'tca_alt': pass_elevation}
 
 
-def predict_available_observation_windows(station, min_horizon, satellite,
-                                          start_date, end_date, sat):
+def predict_available_observation_windows(station, min_horizon, tle, start_date, end_date, sat):
     '''
     Calculates available observation windows for a certain station and satellite during
     the given time period.
@@ -189,6 +188,8 @@ def predict_available_observation_windows(station, min_horizon, satellite,
     Returns list of passes found and list of available observation windows
     '''
     passes_found = []
+    # Initialize pyehem Satellite for propagation
+    satellite = ephem.readtle(*tle)
     # Initialize pyephem Observer for propagation
     observer = ephem.Observer()
     observer.lon = str(station.lng)
diff --git a/network/base/views.py b/network/base/views.py
index 23ef20b..4f09464 100644
--- a/network/base/views.py
+++ b/network/base/views.py
@@ -424,9 +424,6 @@ def prediction_windows(request):
     start_date = make_aware(datetime.strptime(start_date, '%Y-%m-%d %H:%M'), utc)
     end_date = make_aware(datetime.strptime(end_date, '%Y-%m-%d %H:%M'), utc)
 
-    # Initialize pyehem Satellite for propagation
-    satellite = ephem.readtle(*tle)
-
     data = []
 
     stations = Station.objects.filter(status__gt=0)
@@ -448,7 +445,7 @@ def prediction_windows(request):
     for station in available_stations:
         station_passes, station_windows = predict_available_observation_windows(station,
                                                                                 min_horizon,
-                                                                                satellite,
+                                                                                tle,
                                                                                 start_date,
                                                                                 end_date,
                                                                                 sat)