INSTRUMENT LANDING SYSTEM IMPROVEMENT PROGRAM

Results of ILS improvement studies performed at Ohio University are reported. The report is divided into sections ILS Glide Slope and ILS Localizer. Some of the topics treated under ILS Glide Slope are terrain effects and terrain grading criteria, snow effects, development of a directional glide slope antenna with integral monitoring, siting problems at specific sites, and introductory work on reflections from large aircraft. The main topics treated under ILS Localizer are suppression of parasitics in the Scanwell localizer, study of augmentation of clearance generated by the Scanwell localizer, performance of the Scanwell array and three types of monitor under localizer fault conditions, reflection of localizer signals from hangars and from large aircraft, and preliminary work on design of a localizer array which produces clearance within a 35 degrees sector only.

• Supplemental Notes:
  • See also AD-709 350.
• Corporate Authors:

  ohio University, Athens

  Department of Electrical Engineering, Clippinger Building
  Athens, OH  United States  45701

  Federal Aviation Administration

  Systems R&D Service, 800 Independence Avenue, SW
  Washington, DC  United States 
• Publication Date: 1971-10

Media Info

• Pagination: 186 p.

Subject/Index Terms

• TRT Terms: Directional antennas; Glide path systems; Instrument landing systems; Monitoring; Scattering; Transmission
• Uncontrolled Terms: Attenuation
• Old TRIS Terms: Radio transmission

Filing Info

• Accession Number: 00090151
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: EER-5-11 Intrm Rpt.
• Contract Numbers: FA-69-WA-2066
• Files: NTIS, USDOT
• Created Date: Apr 22 1975 12:00AM