diff --git a/modules/aeolus/datasource.py b/modules/aeolus/datasource.py
index b465820bab71c250751c5fd49a065d843639c1a2..aa5e1ebc44e4f19440576fde2d8bea80f2f44a33 100644
--- a/modules/aeolus/datasource.py
+++ b/modules/aeolus/datasource.py
@@ -156,7 +156,7 @@ class CLAVRx_VIIRS(Files):
         lons = h5f['longitude'][:, :]
         lats = h5f['latitude'][:, :]
         lons = np.where(lons < 0, lons + 360, lons)
-        ll_grid = LonLatGrid(lons, lats)
+        ll_grid = LonLatGrid(lons, lats, reduce=2)
         return ll_grid