COMPARISON OF SLANT AND RUNWAY VISUAL RANGE RELATIONSHIPS FOR 100, 124, AND 155 FEET

Ratios of slant visual range measured from heights of 100, 124, and 155 feet to horizontal visual range measured at 15 feet were computed for low-visibility regimes. These ratios were found to be related to the linear fog density profile expressed as the difference in horizontal atmospheric transmittance between the top (100-, 124-, and 155-foot) and bottom (15-foot) levels. It was determined that useful estimates of slant visual range could be provided through these relationships. The predictions would be most accurate when the visibility decreased with height (most common fog structure). A slight increase in accuracy would also be expected with decreasing slant height.

• Supplemental Notes:
  • Continuation of Rept. No. FAA-RD-77-34, AD-A041134.
• Corporate Authors:

  National Aviation Facilities Experimental Center

  Federal Aviation Administration
  Atlantic City, NJ  United States  08405
• Authors:
  • Lewis, W
• Publication Date: 1978-4

Media Info

• Pagination: 19 p.

Subject/Index Terms

• TRT Terms: Airport runways; Airports; Fog; Landing; Landing aids; Linear regression analysis; Mathematical prediction; Monitoring; Surface temperature; Velocity; Visibility; Weather; Wind
• Uncontrolled Terms: Monitors; Profiles
• Old TRIS Terms: Aircraft landing; Linear regression analyses; Slant range; Transmissometers; Wind velocity
• Subject Areas: Aviation; Data and Information Technology; Pavements; Terminals and Facilities;

Filing Info

• Accession Number: 00175982
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-RD-77-191 Final Rpt., FAA-NA-78-1
• Files: NTIS, TRIS, USDOT
• Created Date: Jul 19 1978 12:00AM