^ uvh5 addition

src/pyuvdata/uvdata/uvdata.py

@@ -1397,7 +1397,9 @@ def _consolidate_phase_center_catalogs(
             # match, so this is functionally the same source
             self._update_phase_center_id(match_id, new_id=cat_id)
             # look_in_catalog ignores the "info_source" field, so update it to match
-            self.phase_center_catalog[cat_id]["info_source"] = cat_entry["info_source"]
+            info_source = cat_entry.get("info_source")
+            if info_source is not None:
+                self.phase_center_catalog[cat_id]["info_source"] = info_source
             if ignore_name:
                 # Make the names match if names were ignored in matching
                 self.phase_center_catalog[cat_id]["cat_name"] = cat_entry["cat_name"]

tests/uvdata/test_uvh5.py

@@ -362,6 +362,23 @@ def test_uvh5_optional_parameters(casa_uvfits, tmp_path):
     return
 
 
+def test_uvh5_addition():
+    inputfiles = [
+        os.path.join(
+            DATA_PATH, f"ata.LoA.C0{subband}.uvh5_60647_62965_9760406_3c286_0001.uvh5"
+        )
+        for subband in ["352", "544"]
+    ]
+
+    # write out and read back in
+    uv1, uv2 = UVData(), UVData()
+    uv1.read(inputfiles[0])
+    uv2.read(inputfiles[1])
+
+    uv1 + uv2
+    return
+
+
 @pytest.mark.filterwarnings("ignore:The uvw_array does not match the expected values")
 def test_uvh5_compression_options(casa_uvfits, tmp_path):
     """