code: def _create_header_metadata() -> str:
      archive_metadata_header = (
          "GROUP = ARCHIVEDMETADATA\n"
          'TEST_URL = "http://modis.gsfc.nasa.gov/?some_val=100"\n'
          "END_GROUP = ARCHIVEDMETADATA\nEND"
      )
      return archive_metadata_header
  
imports: from __future__ import annotations
  from datetime import datetime, timedelta
  from typing import Optional
  import numpy
  import pytest
  from pyhdf.SD import SD, SDC
label_desc: Use image node_id 18 for calling a global function with example usage: _create_header_metadata() and returns: archive_metadata_header