diff --git a/animation/geostationary.toml b/animation/geostationary.toml
index c035dec..7782aa7 100644
--- a/animation/geostationary.toml
+++ b/animation/geostationary.toml
@@ -40,6 +40,6 @@ arc_of_ascending_nodes = 360.0
 eccentricity = 0.0
 
 [[ground_station]]
-name = "TU Berlin"
+name = "TUBerlin"
 lat = 52.51499
 long = 13.32674
diff --git a/animation/iridium.toml b/animation/iridium.toml
index 4e74499..32c7372 100644
--- a/animation/iridium.toml
+++ b/animation/iridium.toml
@@ -40,6 +40,6 @@ arc_of_ascending_nodes = 180.0
 eccentricity = 0.0
 
 [[ground_station]]
-name = "TU Berlin"
+name = "TUBerlin"
 lat = 52.51499
 long = 13.32674
diff --git a/animation/kuiper.toml b/animation/kuiper.toml
index d1a42b8..db1ee7e 100644
--- a/animation/kuiper.toml
+++ b/animation/kuiper.toml
@@ -56,6 +56,6 @@ arc_of_ascending_nodes = 360.0
 eccentricity = 0.0
 
 [[ground_station]]
-name = "TU Berlin"
+name = "TUBerlin"
 lat = 52.51499
 long = 13.32674
diff --git a/animation/oneweb.toml b/animation/oneweb.toml
index 321d85c..240d28e 100644
--- a/animation/oneweb.toml
+++ b/animation/oneweb.toml
@@ -56,6 +56,6 @@ arc_of_ascending_nodes = 360.0
 eccentricity = 0.0
 
 [[ground_station]]
-name = "TU Berlin"
+name = "TUBerlin"
 lat = 52.51499
 long = 13.32674
diff --git a/animation/starlink.toml b/animation/starlink.toml
index c7e1c0f..315f11c 100644
--- a/animation/starlink.toml
+++ b/animation/starlink.toml
@@ -115,6 +115,6 @@ arc_of_ascending_nodes = 360.0
 eccentricity = 0.0
 
 [[ground_station]]
-name = "TU Berlin"
+name = "TUBerlin"
 lat = 52.51499
 long = 13.32674
diff --git a/celestial/animation.py b/celestial/animation.py
index 42eb724..742f1b5 100644
--- a/celestial/animation.py
+++ b/celestial/animation.py
@@ -26,6 +26,8 @@
 import typing
 
 import celestial.config
+import celestial.types
+import celestial.shell
 
 EARTH_RADIUS_M = 6371000  # radius of Earth in meters
 
@@ -539,9 +541,9 @@ def makeInactiveSatsActor(self, shell_no: int, shell_total_sats: int) -> None:
 
         # initialize all the positions
         for i in range(len(self.sat_positions[shell_no])):
-            self.shell_inactive_actors[shell_no].satPointIDs[
-                i
-            ] = self.shell_inactive_actors[shell_no].satVtkPts.InsertNextPoint(0, 0, 0)
+            self.shell_inactive_actors[shell_no].satPointIDs[i] = (
+                self.shell_inactive_actors[shell_no].satVtkPts.InsertNextPoint(0, 0, 0)
+            )
 
             self.shell_inactive_actors[shell_no].satVtkVerts.InsertNextCell(1)
             self.shell_inactive_actors[shell_no].satVtkVerts.InsertCellPoint(