SLANT VISUAL RANGE (SVR)/APPROACH LIGHT CONTACT HEIGHT (ALCH) MEASUREMENT SYSTEM: EVALUATION IN FOG

Systems with potential for predicting SVR/ALCH were tested at the National Aviation Facilities Experimental Center (NAFEC), Federal Aviation Administration, Department of Transportation, Atlantic City, New Jersey. These systems' estimation of the slant path transmittance were compared to data being generated by NBS transmissometers located at several levels on nearby 160-foot towers. The transmittance values predicted by the systems being evaluated were used to compute RVR and SVR data. The results of these computations were compared to the actual RVR-SVR calculated based upon NBS transmissometer measurement. The report contains data on the stratification of the fogs observed at NAFEC during the test duration. Pilot eye response is considered with emphasis on techniques of determining the pilot's adaptation level. The pilot's adaptation level calculation is combined with (1) the extinction rate measurements, (2) pilot's eye response and (3) the geometry of the scenario in order to form ALCH and SVR algorithms. (Author)

• Supplemental Notes:
  • See also report dated 26 Apr 72, AD-742 964.
• Corporate Authors:

  Naval Ammunition Depot

  Crane, Indiana,    
• Publication Date: 1974-1

Media Info

• Pagination: 136 p.

Filing Info

• Accession Number: 00056962
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Phase 2 Final Rpt
• Contract Numbers: DOT-FA71WAI-213
• Files: NTIS
• Created Date: Jul 31 1974 12:00AM