Dulles Category IIIA ILS Evaluation

Abstract

The Category IIIA ILS guidance system is designed to provide a VHF/ UHF localizer and glide slope with increased performance and a backup capability. The overall flyability of the systems must be superior to a Category I or II system due to the lower minimums (700 feet RVR) authorized for the approach. Since the radiated signal is in the UHF/VHF frequency band, it is subject to the same errors and limitations caused by ground or airborne vehicles. The success, then, of a Category IIIA approach depends on the control of interference factors and capability of the aircraft and pilot to maintain the localizer and glide path.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1972
Accession Number
AD0747656

Entities

People

  • Donald L. Carmack

Tags

DTIC Thesaurus Topics

  • Air Traffic Control Systems
  • Aircrafts
  • Altitude
  • Automatic Pilots
  • Backup Systems
  • Control Systems
  • Flight
  • Flight Control Systems
  • Flight Paths
  • Glide Slope
  • Guidance
  • Human Factors Engineering
  • Instrument Flight
  • Jet Aircraft
  • Navigation
  • Radar Altimeters
  • Security

Readers

  • Aviation Safety and Air Traffic Management
  • Radar Systems Engineering.