class_docstr: File handler for TROPOMI L2 netCDF files.
class_docstr_tok: ["File","handler","for","TROPOMI","L2","netCDF","files","."]
docstr: Get start time.
docstr_tok: ["Get","start","time","."]
code: def start_time(self):
      """Get start time."""
      return self.filename_info["start_time"]
  
imports: import logging
  from datetime import datetime
  import dask.array
  import numpy
  import xarray
  from satpy.readers.netcdf_utils import NetCDF4FileHandler, netCDF4
  from satpy.utils import get_legacy_chunk_size
label_desc: Use image node_id 1 for calling the TROPOMIL2FileHandler obj's underlying member method code with example usage: obj.start_time() and returns: self