class_docstr: A base file handler for the AAPP level-1 formats.
class_docstr_tok: ["A","base","file","handler","for","the","AAPP","level-1","formats","."]
docstr: Calibrate active channel data only.
code: def _calibrate_active_channel_data(self, key):
      """Calibrate active channel data only."""
      raise NotImplementedError(
          "This should be implemented in the sub class"
      )
  
imports: import functools
  import logging
  from datetime import datetime, timedelta
  import dask.array
  import numpy
  import xarray
  from dask import delayed
  from satpy.readers.file_handlers import BaseFileHandler
  from satpy.utils import get_chunk_size_limit
label_desc: Use image node_id 8 for calling the AAPPL1BaseFileHandler obj's underlying member method code with example usage: obj._calibrate_active_channel_data(key) without return types