diff --git a/csst/msc/data_manager.py b/csst/msc/data_manager.py
index 21251686e3ef2d91eade0e1a66aed77bf5d2faf6..c0880aeb89f874cac4c1ae0009c83b1c22f24cbd 100644
--- a/csst/msc/data_manager.py
+++ b/csst/msc/data_manager.py
@@ -164,22 +164,29 @@ class CsstMscDataManager:
                 self._exp_start, self._exp_stop, self._exp_id, ccd_id, suffix, ext)
         return os.path.join(self.dir_l1, fn)
 
-    def pc_combined_image(self, suffix="img", ext="fits"):
+    def pc_combined_file(self, suffix="img", ext="fits"):
         """ combined images
 
         Parameters
         ----------
         suffix:
-            {"img", "wht", "flg", "cat"}
+            {"img", "wht", "flg", "cat", "head"}
         ext:
-            {"fits", }
+            {"fits", "head", "ahead" }
 
         Returns
         -------
         combined image path
 
         """
-        fn = "combined_" + "{}.{}".format(suffix, ext)
+        if self.ver_sim == "C3":
+            fn = "{}_{}_{}_{}_{}.{}".format(
+                self._instrument, self._survey,
+                self._exp_start, self._exp_id, suffix, ext)
+        elif self.ver_sim == "C5.1":
+            fn = "{}_{}_{}_SCI_{}_{}_{}_{}.{}".format(
+                self._telescope, self._instrument, self._survey,
+                self._exp_start, self._exp_stop, self._exp_id, suffix, ext)
         return os.path.join(self.dir_l1, fn)
 
     @property
@@ -187,16 +194,16 @@ class CsstMscDataManager:
         """ reference catalog """
         return os.path.join(self.dir_l1, "ref.cat")
 
+    @property
+    def pc_radecoff(self):
+        """ plot coordinate diff between obs and ref """
+        return os.path.join(self.dir_l1, "radec_off.png")
+
     @property
     def pc_check_fits(self):
         """ check fits """
         return os.path.join(self.dir_l1, "check.fits")
 
-    @property
-    def pc_combined_head(self):
-        """ combined head """
-        return os.path.join(self.dir_l1, "combined_cat.head")
-
     @property
     def pc_combined_head_fits(self):
         """ combined head (converted to) fits """