remove dm.now_dfs() & change dm.get_coord()

csst_common/data_manager.py

@@ -303,10 +303,6 @@ class CsstMsDataManager:
     def now():
         return now()
 
-    @staticmethod
-    def now_dfs():
-        return now_dfs()
-
     # DFS APIs
     @property
     def dfs_L0DataApi(self):
@@ -737,8 +733,12 @@ class CsstMsDataManager:
     def get_coord(self):
         """ Get pointing coordinate. """
         header = fits.getheader(self.l0_detector(detector=self.target_detectors[0]))
-        pointing_ra = header["RA_OBJ"]
-        pointing_dec = header["DEC_OBJ"]
+        if self.ver_sim == "C5.2":
+            pointing_ra = header["RA_OBJ"]
+            pointing_dec = header["DEC_OBJ"]
+        else:
+            pointing_ra = header["OBJ_RA"]
+            pointing_dec = header["OBJ_DEC"]
         return pointing_ra, pointing_dec
 
     def dfs_rc_auto(self):