class_docstr: SEVIRI HRIT format reader.
  
  **Calibration**
  
  See :mod:`satpy.readers.seviri_base`.
  
  
  **Padding of the HRV channel**
  
  By default, the HRV channel is loaded padded with no-data, returning
  a full-disk dataset. If you want the original, unpadded data,
  just provide the `fill_hrv` as False in the `reader_kwargs`::
  
      scene = satpy.Scene(filenames,
                          reader='seviri_l1b_hrit',
                          reader_kwargs={'fill_hrv': False})
  
  **Metadata**
  
  See :mod:`satpy.readers.seviri_base`.
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docstr: Initialize the reader.
code: def __init__(
      self,
      filename,
      filename_info,
      filetype_info,
      prologue,
      epilogue,
      calib_mode="nominal",
      ext_calib_coefs=None,
      include_raw_metadata=False,
      mda_max_array_size=100,
      fill_hrv=True,
      mask_bad_quality_scan_lines=True,
  ):
      """Initialize the reader."""
      super(HRITMSGFileHandler, self).__init__(
          filename,
          filename_info,
          filetype_info,
          (msg_hdr_map, msg_variable_length_headers, msg_text_headers),
      )
  
      self.prologue_ = prologue
      self.epilogue_ = epilogue
      self.prologue = prologue.prologue
      self.epilogue = epilogue.epilogue
      self._filename_info = filename_info
      self.include_raw_metadata = include_raw_metadata
      self.mda_max_array_size = mda_max_array_size
      self.fill_hrv = fill_hrv
      self.calib_mode = calib_mode
      self.ext_calib_coefs = ext_calib_coefs or {}
      self.mask_bad_quality_scan_lines = mask_bad_quality_scan_lines
      self._get_header()
  
imports: from __future__ import division
  import copy
  import logging
  from datetime import timedelta
  import dask.array
  import numpy
  import xarray
  from pyresample import geometry
  import satpy.readers.utils
  from satpy._compat import cached_property
  from satpy.readers._geos_area import get_area_definition, get_area_extent, get_geos_area_naming
  from satpy.readers.eum_base import get_service_mode, recarray2dict, time_cds_short
  from satpy.readers.hrit_base import HRITFileHandler, ancillary_text, annotation_header, base_hdr_map, image_data_function
  from satpy.readers.seviri_base import CHANNEL_NAMES, HRV_NUM_COLUMNS, REPEAT_CYCLE_DURATION, SATNUM, NoValidOrbitParams, OrbitPolynomialFinder, SEVIRICalibrationHandler, add_scanline_acq_time, create_coef_dict, get_cds_time, get_satpos, mask_bad_quality, pad_data_horizontally, round_nom_time
  from satpy.readers.seviri_l1b_native_hdr import hrit_epilogue, hrit_prologue, impf_configuration
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 1 to create a new HRITMSGFileHandler object from inherited base classes: HRITFileHandler with example: obj = HRITMSGFileHandler(filename, filename_info, filetype_info, prologue, epilogue, calib_mode, ext_calib_coefs, include_raw_metadata, mda_max_array_size, fill_hrv, mask_bad_quality_scan_lines)