BEACON CAS (BCAS) AN INTEGRATED AIR/GROUND COLLISION AVOIDANCE SYSTEM

BCAS is a DABS-based airborne collision avoidance system that exploits the features of DABS discrete addressing and integral data link. This provides for a CAS with the unique capabilities of (1) cooperative threat resolution between BCAS and conflicting aircraft through the transmission of maneuver intent (to DABS-only aircraft) and tie breaking (with other BCAS aircraft) and (2) coordination of CAS activides with the ground ATC control function through the DABS air-ground-air data link. All beacon-equipped aircraft in the vicinity of the BCAS are detected. ATCRBS-equipped aircraft are interrogated using a special Mode C interrogation. DABS aircraft are detected passively through periodic squitters emitted by all DABS transponders. Squitter-detected aircraft are tracked on altitude and only those aircraft that represent a co-altitude threat are discretely interrograted to establish a range/ altitude track. The use of discrete addressing eliminates synchronous garble for the BCAS in the same manner as for DABS. This document provides a general description of BCAS from the viewpoint of its operational features and then describes the avionics package required to achieve this capability. (Author)

• Corporate Authors:

  Lincoln Laboratory

  Massachusetts Institute of Technology
  Lexington, MA  United States  02173
• Authors:
  • ORLANDO, V A
  • WELCH, J D
• Publication Date: 1976-3-23

Media Info

• Pagination: 22 p.

Subject/Index Terms

• TRT Terms: Air traffic control; Air traffic control radar beacon system; Airport surface traffic control; Avionics; Beacons; Crash avoidance systems; Data communications; Integrated systems; Interrogation; Mode S; Transponders
• Uncontrolled Terms: Airborne; Data links
• Old TRIS Terms: Air to surface
• Subject Areas: Aviation; Operations and Traffic Management;

Filing Info

• Accession Number: 00133028
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-RD-76-2 Proj. Rpt., ATC-62
• Contract Numbers: F19628-76-C-0002, DOT-FA72WAI-261
• Files: NTIS, TRIS
• Created Date: Jun 23 1976 12:00AM