THE SINGLE-SITE COLLISION AVOIDANCE SYSTEM (SS-CAS)

SS-CAS is a unique beacon collision avoidance system which works in conjunction with the current and next generation air traffic control surveillance systems (ATCRBS and DABS). In its passive mode, SS-CAS provides three dimensional position of both user and target aircraft using beacon replies from only one ground-based DABS or ATCRBS interrogator. Full collision avoidance service is provided in both the all-ATCRBS environment of today, the all-DABS environment of tomorrow, and the intervening transition period. The ground and airborne equipments required are add-ons to the ground beacon and the airborne DABS units. A two-way data link separate from, but compatible in format with, the DABS data link provides the SS-CAS-Equipped aircraft with important site data. A tracker capable of reading reliable tracks through ATCRBS synchronous garble is employed. DABS replies arrive gargle-free at the SS-CAS aircraft and are simple to track. An active mode and multi-site usage capability are available for performance enhancement in identified special situations. This report fully describes the SS-CAS concept as it functions in the all-ATCRBS, all-DABS and transition environments. (Author)

• Corporate Authors:

  Stanford Telecommunications Incorporated

  1307 Dolley Madison Boulevard
  McLean, VA  United States  22102
• Authors:
  • SCHUCHMAN, L
  • Orr, R
• Publication Date: 1977-9-16

Media Info

• Pagination: 150 p.

Subject/Index Terms

• TRT Terms: Air traffic control; Air traffic control radar beacon system; Airport surface traffic control; Avionics; Crash avoidance systems; Data communications; Mode S; Omnidirectional antennas; Position fixing; Radar air traffic control; Radar beacons; Radar tracking; Synchronous control; Transponders
• Uncontrolled Terms: Data link; Data links
• Old TRIS Terms: Position finding; Synchronization electronics
• Subject Areas: Aviation; Operations and Traffic Management;

Filing Info

• Accession Number: 00169398
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-EM-77-8
• Contract Numbers: F04701-75-C-0239
• Files: NTIS, TRIS
• Created Date: Mar 14 1978 12:00AM