class_docstr: Base class for reading JPSS VIIRS & ATMS SDR HDF5 Files.
docstr: Get how many rows of data constitute one scanline.
docstr_tok: ["Get","how","many","rows","of","data","constitute","one","scanline","."]
code: def _scan_size(self, dataset_group_name):
      """Get how many rows of data constitute one scanline."""
      if "ATM" in dataset_group_name:
          scan_size = 1
      elif "I" in dataset_group_name:
          scan_size = 32
      else:
          scan_size = 16
      return scan_size
  
imports: import logging
  from datetime import datetime, timedelta
  import dask.array
  import numpy
  import xarray
  from satpy.readers.hdf5_utils import HDF5FileHandler
label_desc: Use image node_id 18 for calling the JPSS_SDR_FileHandler obj's underlying member method code with example usage: obj._scan_size(dataset_group_name) and returns: scan_size