approaches/ariane: change value for maximum decile

tas/approaches/_ariane.py

@@ -21,7 +21,7 @@ class ARIANEApproach(TASAutonomousApproach):
         self.thread_server_started = False
 
         self.level_backgr_diffs_rel_max = 0.5
-        self.level_backgr_diffs_abs_min = 10
+        self.level_backgr_diffs_abs_min = 15
         self.level_backgr_decile_max = 6
         self.thresh_intens_fact = 0.5
         self.num_kernel_optim_restarts = 100