class_docstr: File handler for NUCAPS netCDF4 format.
class_docstr_tok: ["File","handler","for","NUCAPS","netCDF4","format","."]
docstr: Return standard sensor or instrument name for the file's data.
docstr_tok: ["Return","standard","sensor","or","instrument","name","for","the","file","'s","data","."]
code: def sensor_names(self):
      """Return standard sensor or instrument name for the file's data."""
      try:
          res = self["/attr/instrument_name"]
          res = [x.strip() for x in res.split(",")]
          if len(res) == 1:
              return res[0].lower()
      except KeyError:
          res = ["CrIS", "ATMS", "VIIRS"]
      return set(name.lower() for name in res)
  
imports: import logging
  from collections import defaultdict
  import numpy
  import pandas
  import xarray
  from satpy.readers.netcdf_utils import NetCDF4FileHandler
  from satpy.readers.yaml_reader import FileYAMLReader
label_desc: Use image node_id 9 for calling the NUCAPSFileHandler obj's underlying member method code with example usage: obj.sensor_names() and returns: set, res