diff --git a/config/obs_config_Calibration_BIAS.yaml b/config/obs_config_Calibration_BIAS.yaml
index 384c74415a331ef168e76ac198783a65af3119c6..25d765f875357edc78dc8db7e845f207690d75c1 100644
--- a/config/obs_config_Calibration_BIAS.yaml
+++ b/config/obs_config_Calibration_BIAS.yaml
@@ -43,7 +43,11 @@ call_sequence:
   # Apply PRNU to accumulated photons
   PRNU_effect: {}
   # Accumulate photons caused by cosmic rays
-  cosmic_rays: {}
+  cosmic_rays:
+  # [Optional]: exposure time of the pointing will be used as default.
+    # Set it here is you want to override the default
+    # exptime: 150. # [s]
+    save_cosmic_img:  NO # # Whether to export cosmic ray image
   # Add Poission noise and dark current
   poisson_and_dark:
     add_dark: YES
diff --git a/config/obs_config_Calibration_FLAT.yaml b/config/obs_config_Calibration_FLAT.yaml
index e5546276ab5d052263ffedd1745174e627b417e9..17bd5d66958a275f135243825ab74b9152ffda8a 100644
--- a/config/obs_config_Calibration_FLAT.yaml
+++ b/config/obs_config_Calibration_FLAT.yaml
@@ -43,7 +43,11 @@ call_sequence:
   # Apply PRNU to accumulated photons
   PRNU_effect: {}
   # Accumulate photons caused by cosmic rays
-  cosmic_rays: {}
+  cosmic_rays:
+  # [Optional]: exposure time of the pointing will be used as default.
+    # Set it here is you want to override the default
+    # exptime: 150. # [s]
+    save_cosmic_img:  NO # # Whether to export cosmic ray image
   # Add Poission noise and dark current
   poisson_and_dark:
     add_dark: YES