diff --git a/components/groundstation.py b/components/groundstation.py
index d0ca43878f45415dbb2edeec695263b013263131..897f3c6dc51bdcf73cda1d8648b42c4fa34ae7e0 100644
--- a/components/groundstation.py
+++ b/components/groundstation.py
@@ -31,11 +31,11 @@ comp = yac.def_comp("pamtra")
 coords = np.array(args.coords)
 ncoords = len(args.coords)
 grid = UnstructuredGrid("pamtra-grid", [3]*ncoords,
-                        [*coords[0,:], *(coords[0,:]+0.1), *coords[0,:]],
-                        [*coords[1,:], *coords[1,:], *(coords[1,:]+0.1)],
+                        [*coords[:,0], *(coords[:,0]+0.1), *coords[:,0]],
+                        [*coords[:,1], *coords[:,1], *(coords[:,1]+0.1)],
                         zip(range(ncoords), range(ncoords, 2*ncoords), range(2*ncoords, 3*ncoords)))
 points = grid.def_points(Location.CELL,
-                         coords[0,:], coords[1,:])
+                         coords[:,0], coords[:,1])
 
 yac.sync_def()