Correct pairs to minimize filter changes

lsst · Jan 21, 2025 · d132934 · d132934
1 parent abe820a
commit d132934
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/rubin_scheduler/scheduler/detailers/detailer.py b/rubin_scheduler/scheduler/detailers/detailer.py
@@ -582,7 +582,13 @@ def __call__(self, observation_array, conditions):
         observation_array["scheduler_note"] = np.char.add(
             observation_array["scheduler_note"], ", %s" % tags[1]
         )
-        result = np.concatenate([paired, observation_array])
+
+        # Try to avoid extra filter changes and have "a" tag
+        # come first.
+        if conditions.current_band == self.bandname:
+            result = np.concatenate([paired, observation_array])
+        else:
+            result = np.concatenate([observation_array, paired])
 
         return result