class_docstr: File handler for insat 3d imager data.
class_docstr_tok: ["File","handler","for","insat","3d","imager","data","."]
docstr: Get the start time.
docstr_tok: ["Get","the","start","time","."]
code: def start_time(self):
      """Get the start time."""
      start_time = datetime.strptime(
          self.datatree.attrs["Acquisition_Start_Time"],
          "%d-%b-%YT%H:%M:%S",
      )
      return start_time
  
imports: from contextlib import suppress
  from datetime import datetime
  from functools import cached_property
  import dask.array
  import numpy
  import xarray
  from satpy.utils import import_error_helper
  from satpy.readers.file_handlers import BaseFileHandler
label_desc: Use image node_id 1 for calling the Insat3DIMGL1BH5FileHandler obj's underlying member method code with example usage: obj.start_time() and returns: start_time