class_docstr: Filehandler for geo info.
docstr: Get the start time.
docstr_tok: ["Get","the","start","time","."]
code: def start_time(self):
      """Get the start time."""
      return datetime.strptime(
          self.nc.attrs["start_time"], "%Y-%m-%dT%H:%M:%S.%fZ"
      )
  
imports: import logging
  import os
  import re
  import warnings
  from datetime import datetime
  import dask.array
  import numpy
  import xarray
  from satpy.readers.file_handlers import BaseFileHandler
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 3 for calling the NCSLSTRGeo obj's underlying member method code with example usage: obj.start_time() and returns: datetime