INSTRUMENT LANDING SYSTEM IMPROVEMENT PROGRAM: FAR-FIELD MONITORING

Methods of far-field extrapolation monitoring of the ILS glide slope angle are investigated. The use of a quasilinearization algorithm to determine path angle and width from measurements below obstruction heights at the middle marker is described with results for various fault conditions tabulated. A precision space modulation quotient monitor (SMQ) for measuring high values of DDM at low signal levels is described. A description of investigations of a field strength monitor using the capture effect principle to sense changes in low altitude field strength caused by environmental effects is included. (Author)

• Corporate Authors:

  Ohio University, Athens

  3 Canterbury Drive
  Athens, OH  United States  45701
• Publication Date: 1975-1

Media Info

• Pagination: 87 p.

Subject/Index Terms

• TRT Terms: Air traffic control; Algorithms; Extrapolation; Far field; Field strength; Glide path systems; Instrument landing systems; Linearity; Measurement; Modulation; Monitoring; Probes (Measuring devices)
• Old TRIS Terms: Field intensity; Modulation; Probes
• Subject Areas: Operations and Traffic Management;

Filing Info

• Accession Number: 00166417
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: EER-5-21, FAA-RD-75-201
• Contract Numbers: DOT-FA69WA-2066
• Files: NTIS
• Created Date: Sep 28 2002 12:00AM