class_docstr: SEVIRI Level 1.5 trailer for native-format.
  
  Reference Document (EUM/MSG/ICD/105):
  MSG Level 1.5 Image Data Format Description
docstr: Get header record data.
code: def get(self):
      """Get header record data."""
      # 380363 bytes
      record = [
          ("GP_PK_HEADER", GSDTRecords.gp_pk_header),
          ("GP_PK_SH1", GSDTRecords.gp_pk_sh1),
          ("15TRAILER", self.seviri_l15_trailer),
      ]
  
      return np.dtype(record).newbyteorder(">")
  
imports: import numpy
  from satpy.readers.eum_base import time_cds, time_cds_expanded, time_cds_short
  from satpy.readers.seviri_base import HRV_NUM_COLUMNS, HRV_NUM_LINES, VISIR_NUM_COLUMNS, VISIR_NUM_LINES
label_desc: Use image node_id 1 for calling the Msg15NativeTrailerRecord obj's underlying member method code with example usage: obj.get() and returns: np