diff --git a/resolve/data/observation.py b/resolve/data/observation.py
index 73407d08ca6d52836ae6de400100c6936ef9297e..269d00f85172cc2c8e57afcbc00224901680482b 100644
--- a/resolve/data/observation.py
+++ b/resolve/data/observation.py
@@ -485,6 +485,18 @@ class Observation(BaseObservation):
     def antenna_positions(self):
         return self._antpos
 
+    @property
+    def ant1(self):
+        return self._antpos.ant1
+
+    @property
+    def ant2(self):
+        return self._antpos.ant2
+
+    @property
+    def time(self):
+        return self._antpos.time
+
     @property
     def direction(self):
         if self._auxiliary_tables is not None and "FIELD" in self._auxiliary_tables:
diff --git a/resolve/polarization_space.py b/resolve/polarization_space.py
index 380681fb93a6845312dc235d53d714386f94fd05..5cb209e8a87eb694df51688fe7e1c4ab0011779b 100644
--- a/resolve/polarization_space.py
+++ b/resolve/polarization_space.py
@@ -1,17 +1,6 @@
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-# Copyright(C) 2013-2021 Max-Planck-Society
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright(C) 2021 Max-Planck-Society
+# Author: Philipp Arras, Jakob Knollmüller
 
 import nifty8 as ift