class_docstr: VIRR Level 1b reader.
class_docstr_tok: ["VIRR","Level","1b","reader","."]
code: def _correct_slope(self, slope):
      # 0 slope is invalid. Note: slope can be a scalar or array.
      return da.where(slope == 0, 1, slope)
  
file_path: satpy/satpy/readers/virr_l1b.py
imports: import logging
  from datetime import datetime
  import dask.array
  import numpy
  from pyspectral.blackbody import blackbody_wn_rad2temp
  from satpy.readers.hdf5_utils import HDF5FileHandler
label_desc: Use image node_id 5 for calling the VIRR_L1B obj's underlying member method code with example usage: obj._correct_slope(slope) and returns: da