Ka does not have uppercase. 'ALL' and 'all' must both be accepted

Author: keflavich

astroquery/nrao/core.py

@@ -42,10 +42,10 @@ def wrapper(*args, **kwargs):
                              .format(Nrao.telescope_config))
         if isinstance(obs_band, (list, tuple)):
             for ob in obs_band:
-                if ob.upper() not in Nrao.obs_bands:
+                if ob not in Nrao.obs_bands:
                     raise ValueError("'obs_band' must be one of {!s}"
                                      .format(Nrao.obs_bands))
-        elif obs_band.upper() not in Nrao.obs_bands:
+        elif obs_band not in Nrao.obs_bands:
             raise ValueError("'obs_band' must be one of {!s}"
                              .format(Nrao.obs_bands))
         if sub_array not in Nrao.subarrays and sub_array != 'all':
@@ -74,7 +74,7 @@ class NraoClass(QueryWithLogin):
     telescope_config = ['ALL', 'A', 'AB', 'BnA', 'B', 'BC', 'CnB', 'C',
                         'CD', 'DnC', 'D', 'DA']
 
-    obs_bands = ['ALL', '4', 'P', 'L', 'S', 'C', 'X', 'U', 'K', 'Ka', 'Q', 'W']
+    obs_bands = ['ALL', 'all', '4', 'P', 'L', 'S', 'C', 'X', 'U', 'K', 'Ka', 'Q', 'W']
 
     subarrays = ['ALL', 1, 2, 3, 4, 5]