class_docstr: Test VISSR file handler.
class_docstr_tok: ["Test","VISSR","file","handler","."]
docstr: Get first block of orbit prediction data.
docstr_tok: ["Get","first","block","of","orbit","prediction","data","."]
code: def orbit_prediction_1(self):
      """Get first block of orbit prediction data."""
      orb_pred = np.zeros(1, dtype=fmt.ORBIT_PREDICTION)
      orb_pred["data"] = real_world.ORBIT_PREDICTION_1
      return orb_pred
  
imports: import datetime
  import gzip
  import fsspec
  import numpy
  import pytest
  import xarray
  from pyresample.geometry import AreaDefinition
  import satpy.tests.reader_tests.gms.test_gms5_vissr_data
  from satpy.readers import FSFile
  from satpy.tests.reader_tests.utils import get_jit_methods, skip_numba_unstable_if_missing
  from satpy.tests.utils import make_dataid
label_desc: Use image node_id 17 for calling the TestFileHandler obj's underlying member method code with example usage: obj.orbit_prediction_1() and returns: orb_pred