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 navigation extraction data.
code: def navigation_extraction_results(self):
      """Get navigation extraction data."""
      horizon_observation = [
          ("HorizonId", np.uint8),
          ("Alpha", np.float64),
          ("AlphaConfidence", np.float64),
          ("Beta", np.float64),
          ("BetaConfidence", np.float64),
          ("ObservationTime", time_cds),
          ("SpinRate", np.float64),
          ("AlphaDeviation", np.float64),
          ("BetaDeviation", np.float64),
      ]
  
      star_observation = [
          ("StarId", np.uint16),
          ("Alpha", np.float64),
          ("AlphaConfidence", np.float64),
          ("Beta", np.float64),
          ("BetaConfidence", np.float64),
          ("ObservationTime", time_cds),
          ("SpinRate", np.float64),
          ("AlphaDeviation", np.float64),
          ("BetaDeviation", np.float64),
      ]
  
      landmark_observation = [
          ("LandmarkId", np.uint16),
          ("LandmarkLongitude", np.float64),
          ("LandmarkLatitude", np.float64),
          ("Alpha", np.float64),
          ("AlphaConfidence", np.float64),
          ("Beta", np.float64),
          ("BetaConfidence", np.float64),
          ("ObservationTime", time_cds),
          ("SpinRate", np.float64),
          ("AlphaDeviation", np.float64),
          ("BetaDeviation", np.float64),
      ]
  
      record = [
          ("ExtractedHorizons", (horizon_observation, 4)),
          ("ExtractedStars", (star_observation, 20)),
          ("ExtractedLandmarks", (landmark_observation, 50)),
      ]
  
      return record
  
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 4 for calling the Msg15NativeTrailerRecord obj's underlying member method code with example usage: obj.navigation_extraction_results() and returns: record