code: def __init__(self, *args):
      super().__init__(*args)
      self._airmass = self._compute_airmass()
  
imports: from __future__ import annotations
  import logging
  from typing import Optional, Type, Union
  import dask.array
  import numpy
  import xarray
  from satpy.dataset.dataid import WavelengthRange
label_desc: Use image node_id 1 to create a new _VIIRSAtmosphereVariables object from inherited base classes: _AtmosphereVariables with example: obj = _VIIRSAtmosphereVariables()