Ensure LSTs are set before testing them

pyuvdata/uvcal/calh5.py

@@ -240,6 +240,12 @@ def _read_header(
             except AttributeError as e:
                 raise KeyError(str(e)) from e
 
+        self._set_future_array_shapes()
+        if self.wide_band:
+            self._set_wide_band()
+        if self.Nspws > 1 and not self.wide_band:
+            self._set_flex_spw()
+
         if not uvutils._check_history_version(self.history, self.pyuvdata_version_str):
             self.history += self.pyuvdata_version_str
 
@@ -272,6 +278,10 @@ def _read_header(
         except ValueError as ve:
             warnings.warn(str(ve))
 
+        # ensure LSTs are set before checking them.
+        if proc is not None:
+            proc.join()
+
         if run_check_acceptability:
             lat, lon, alt = self.telescope_location_lat_lon_alt_degrees
             if self.time_array is not None:
@@ -294,14 +304,6 @@ def _read_header(
                     lst_tols=(0, uvutils.LST_RAD_TOL),
                     frame=self._telescope_location.frame,
                 )
-        self._set_future_array_shapes()
-        if self.wide_band:
-            self._set_wide_band()
-        if self.Nspws > 1 and not self.wide_band:
-            self._set_flex_spw()
-
-        if proc is not None:
-            proc.join()
 
     def _get_data(
         self,