Merge remote-tracking branch 'origin/master' into current_stable_for_tests

observation_sim/sim_steps/add_pattern_noise.py

@@ -81,5 +81,5 @@ def add_bias(self, chip, filt, tel, pointing, catalog, obs_param):
                                                nsecx=chip.nsecx,
                                                seed=self.overall_config["random_seeds"]["seed_biasNonUniform"]+chip.chipID)
     elif obs_param["bias_16channel"] == False:
-        chip.img += self.bias_level
+        chip.img += chip.bias_level
     return chip, filt, tel, pointing