ENH: Add instrument parameter check for sinarame. (#1532)

* ENH: Add check fro instrument parameters.

* FIX: Add dict definition.

pyart/aux_io/sinarame_h5.py

@@ -348,7 +348,14 @@ def read_sinarame_h5(
             )
 
     # instrument_parameters
-    instrument_parameters = None
+    # Check if no attributes for instrument parameters.
+    if len(hfile["how"].attrs) == 0:
+        instrument_parameters = None
+    # Grab each instrument parameter and its value for the hfile object.
+    else:
+        instrument_parameters = {}
+        for i in hfile["how"].attrs.keys():
+            instrument_parameters[i] = hfile["how"].attrs[i]
 
     return Radar(
         _time,