A dual-level, four-wavelength, L-band interferometer was designed and constructed to demonstrate the feasibility of precisely monitoring and recording the path followed by aircraft on ILS approach. This is accomplished by the application of passive RF interferometry techniques to track the source of the DME interrogation signals radiated by existing airborne radio navigation equipment. The design specifications and performance characteristics of the breadboard equipment are described, as well as methods for converting observed RF phase data into conical space angle. Two series of flight tests were conducted with the breadboard model. The initial tests at Republic Airport demonstrated qualitatively the validity of the concept and provided operational experience. In a second series of tests at Atlantic City, New Jersey (NAFEC), quantitative comparisons were made between optical tracking theodolite measurements of conical angle and those derived from the RF phase measurements. (Modified author abstract)

  • Corporate Authors:

    Airborne Instruments Laboratory

    Cutler-Hammer, Incorporated, Commac Road
    Deer Park, NY  United States  11729
  • Authors:
    • MORTON, G W
  • Publication Date: 1974-4-1

Media Info

  • Pagination: 99 p.

Filing Info

  • Accession Number: 00057964
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: AIL-A026-1 Final Rpt.
  • Contract Numbers: DOT-FA72WA-2840
  • Files: NTIS
  • Created Date: Nov 20 1974 12:00AM