A SLANT VISUAL RANGE/APPROACH LIGHT CONTACT HEIGHT SYSTEM --- AIRPORT. TRANSMISSIOMETERS FOR FOG MEASUREMENTS

A prototype slant visual range/approach light contact height (SVR/ALCH) facility was installed to determine whether or not a combination of presently off-the-shelf equipment could be used to predict slant path visibility. The primary system evaluated was a 100-foot instrumented tower located 1500 feet from each of two 160-ft towers with horizontal transmissometers mounted at six levels. The instrumented tower provided data from a forward scatter meter located at the 100-ft level and a transmissometer at the 5-ft level. Vertical fog structure measurements are described. A comparison is given of horizontal and slant visual range for advective fogs, the psychophysical aspects of SVR and ALCH are discussed, and the SVR/ALCH algorithm is explained. It is concluded that the candidate system will determine slant path transmission and adaptation luminance, but not slant path visual range.

• Supplemental Notes:
  • From the conference on Aerospace and Aeronautical Meteorology (6th), El Paso, Texas, 12-15 November 1974.
• Corporate Authors:

  American Meteorological Society

  45 Beacon Street
  Boston, MA  United States  02108
• Authors:
  • Lohkamp, C W
• Publication Date: 1974

Media Info

• Pagination: 4 p.

Subject/Index Terms

• TRT Terms: Airport capacity; Approach; Equipment; Fog; Instrument landing systems; Instrumentation; Luminance; Prototypes; Towers; Visibility
• Uncontrolled Terms: Airspace capacity; Scatter
• Old TRIS Terms: Approach lights; Slant range
• Subject Areas: Aviation; Bridges and other structures; Terminals and Facilities;

Filing Info

• Accession Number: 00163482
• Record Type: Publication
• Source Agency: International Aerospace Abstracts
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Sep 28 1977 12:00AM