diff --git a/SAS/TMSS/src/tmss/tmssapp/schemas/task_template-target_observation-1.json b/SAS/TMSS/src/tmss/tmssapp/schemas/task_template-target_observation-1.json
index e4225cd441b7b7e0ccd97e0f1ff8dda79b9820d7..5777e4b1b98f9a13f63eacc8c8545438a62deff7 100644
--- a/SAS/TMSS/src/tmss/tmssapp/schemas/task_template-target_observation-1.json
+++ b/SAS/TMSS/src/tmss/tmssapp/schemas/task_template-target_observation-1.json
@@ -6,14 +6,12 @@
   "version": 1,
   "type": "object",
   "properties": {
-    "stations": {
-      "$ref": "http://tmss.lofar.org/api/schemas/commonschematemplate/stations/1#/definitions/stations",
-      "default": [
-        {
-          "list": ["CS001"],
-          "max_missing": 0
-        }
-      ]
+    "station_groups": {
+      "$ref": "http://tmss.lofar.org/api/schemas/commonschematemplate/stations/1#/definitions/station_groups",
+      "default": [ {
+        "stations": ["CS002", "CS003", "CS004", "CS005", "CS006", "CS007"],
+        "max_nr_missing": 1
+      } ]
     },
     "antenna_set": {
       "$ref": "http://tmss.lofar.org/api/schemas/commonschematemplate/stations/1/#/definitions/antenna_set",
@@ -136,7 +134,7 @@
     }
   },
   "required": [
-    "stations",
+    "station_groups",
     "antenna_set",
     "filter",
     "SAPs",