class_docstr: Filehandler for l1 SLSTR data.
  
  By default, the calibration factors recommended by EUMETSAT are applied.
  This is required as the SLSTR VIS channels are producing slightly incorrect
  radiances that require adjustment.
  Satpy uses the radiance corrections in S3.PN-SLSTR-L1.08, checked 11/03/2022.
  User-supplied coefficients can be passed via the `user_calibration` kwarg
  This should be a dict of channel names (such as `S1_nadir`, `S8_oblique`).
  
  For example::
  
      calib_dict = {'S1_nadir': 1.12}
      scene = satpy.Scene(filenames,
                          reader='slstr-l1b',
                          reader_kwargs={'user_calib': calib_dict})
  
  Will multiply S1 nadir radiances by 1.12.
docstr: Adjust SLSTR radiances with default or user supplied values.
docstr_tok: ["Adjust","SLSTR","radiances","with","default","or","user","supplied","values","."]
code: def _apply_radiance_adjustment(self, radiances):
      """Adjust SLSTR radiances with default or user supplied values."""
      chan_name = self.channel + "_" + self.view
      adjust_fac = None
      if self.usercalib is not None:
          # If user supplied adjustment, use it.
          if chan_name in self.usercalib:
              adjust_fac = self.usercalib[chan_name]
      if adjust_fac is None:
          if chan_name in CHANCALIB_FACTORS:
              adjust_fac = CHANCALIB_FACTORS[chan_name]
          else:
              warnings.warn(
                  "Warning: No radiance adjustment supplied "
                  + "for channel "
                  + chan_name,
                  stacklevel=3,
              )
              return radiances
      return radiances * adjust_fac
  
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 2 for calling the NCSLSTR1B obj's underlying member method code with example usage: obj._apply_radiance_adjustment(radiances) and returns: unknown, radiances