added dm.dfs_l0_check_all()

    def dfs_l0_query(self, obs_id: str = "100000100"):

        """ Query L0 data from DFS. """

        result = self.dfs_L0DataApi.find(obs_id=str(obs_id))

        print(f"{result['totalCount']} entries returned from DFS.")

        print(f"{result['totalCount']} records returned from DFS.")

        if not result["code"] == 0:

            raise ValueError(f"DFS returns non-zero code! ({result['code']})")

        tbl = Table([_.__dict__ for _ in result["data"]])

                    self.logger_ppl.warning(f"Record not found for detector {detector:02d} and obs_type {obs_type}")

        return tbl

    def dfs_l0_check_all(self):

        """ Check all C5.2 L0 data is available in DFS. """

        is_good = True

        for obs_id in range(100000020, 100000155):

            tbl = self.dfs_l0_query(obs_id=f"{obs_id}")

            if len(tbl) == 60:

                self.logger_ppl.info(f"DFS returns {len(tbl)} records for obs_id={obs_id}")

            else:

                is_good = False

                self.logger_ppl.warning(f"DFS returns {len(tbl)} records for obs_id={obs_id}")

        return is_good

    def dfs_l1_query(self, obs_id, detector):

        """ Query L1 data from DFS. """

        pass