Enable Standalone collections Keyword, OperaBurstID

SearchAPI/CMR/Output/jsonlite.py

@@ -40,7 +40,8 @@ def req_fields_jsonlite():
         'azimuthAnxTime',
         'samplesPerBurst',
         'subswath',
-        'pgeVersion'
+        'pgeVersion',
+        'operaBurstID',
     ]
     return fields
 
@@ -176,4 +177,9 @@ def getItem(self, p):
 
             result['burst'] = burst
 
+        if p.get('operaBurstID') is not None:
+            result['opera'] = {
+                'operaBurstID': p.get('operaBurstID')
+            }
+
         return result

SearchAPI/CMR/Output/jsonlite2.py

@@ -58,4 +58,7 @@ def getItem(self, p):
         if p.get('burst') is not None: # is a burst product
             result['s1b'] = p['burst']
 
+        if p.get('opera') is not None:
+            result['s1o'] = p['opera']
+
         return result

SearchAPI/CMR/Translate/fields.py

@@ -70,5 +70,8 @@ def get_field_paths():
         'azimuthAnxTime':           attr_path('AZIMUTH_ANX_TIME'),
         'samplesPerBurst':          attr_path('SAMPLES_PER_BURST'),
         'subswath':                 attr_path('SUBSWATH_NAME'),
+
+        # OPERA RTC FIELDS
+        'operaBurstID':                  attr_path('OPERA_BURST_ID'),
     }
     return paths

SearchAPI/CMR/Translate/input_map.py

@@ -55,7 +55,8 @@ def input_map():
         'collections':          ['echo_collection_id[]',            '{0}',                      parse_string_list],
         'relativeburstid':      ['attribute[]',             'int,BURST_ID_RELATIVE,{0}',        parse_int_list],
         'absoluteburstid':      ['attribute[]',             'int,BURST_ID_ABSOLUTE,{0}',        parse_int_list],
-        'fullburstid':          ['attribute[]',             'string,BURST_ID_FULL,{0}',         parse_string_list]
+        'fullburstid':          ['attribute[]',             'string,BURST_ID_FULL,{0}',         parse_string_list],
+        'operaburstid':              ['attribute[]',             'string,OPERA_BURST_ID,{0}',              parse_string_list]
     }
 
     return parameter_map

SearchAPI/SearchQuery.py

@@ -53,13 +53,16 @@ def can_use_cmr(self):
 
     def check_has_search_params(self):
         non_searchable_param = ['output', 'maxresults', 'pagesize', 'maturity']
-        list_param_exceptions = ['collections']
+        list_param_exceptions = ['collections'] # allows collections in granule/product search
 
+        params = [v.lower() for v in self.request.local_values]
+        is_collection_search = 'collections' in params
+
         searchables = [
-            v for v in self.request.local_values if v.lower() not in [*non_searchable_param, *list_param_exceptions]
+            v for v in params if v not in [*non_searchable_param, *list_param_exceptions]
         ]
 
-        if len(searchables) <= 0:
+        if len(searchables) <= 0 and not is_collection_search:
             raise ValueError(
                 'No searchable parameters specified, queries must include'
                 ' parameters besides output= and maxresults='