class_docstr: Class implementing the MTG FCI L1c Filehandler.
  
  This class implements the Meteosat Third Generation (MTG) Flexible
  Combined Imager (FCI) Level-1c NetCDF reader.
  It is designed to be used through the :class:`~satpy.Scene`
  class using the :mod:`~satpy.Scene.load` method with the reader
  ``"fci_l1c_nc"``.
docstr: Get nominal repeat cycle duration.
  
  As RSS is not yet implemeted and error will be raised if RSS are to be read
docstr_tok: ["Get","nominal","repeat","cycle","duration",".","As","RSS","is","not","yet","implemeted","and","error","will","be","raised","if","RSS","are","to","be","read"]
code: def rc_period_min(self):
      """Get nominal repeat cycle duration.
  
      As RSS is not yet implemeted and error will be raised if RSS are to be read
      """
      if not self.filename_info["coverage"] == "FD":
          raise NotImplementedError(
              f"coverage for {self.filename_info['coverage']} not supported by this reader"
          )
          return 2.5
      return 10
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import logging
  from datetime import timedelta
  from functools import cached_property
  import dask.array
  import numpy
  import xarray
  from netCDF4 import default_fillvals
  from pyresample import geometry
  from satpy.readers._geos_area import get_geos_area_naming
  from satpy.readers.eum_base import get_service_mode
  from .netcdf_utils import NetCDF4FsspecFileHandler
label_desc: Use image node_id 2 for calling the FCIL1cNCFileHandler obj's underlying member method code with example usage: obj.rc_period_min() and returns: int, int