A REVIEW AND ANALYSIS OF THE SIERRA DME COLLISION AVOIDANCE SYSTEM

The purpose of the study is to evaluate SIERRA's concept for a collision avoidance system, referred to as DME/CAS. The evaluation is one of a series of studies of various collision avoidance concepts. The DME/CAS is an air-derived synchronous concept intended to exploit the proliferated network of DME ground facilities to obtain synchronization and to adapt airborne DME designs for time-sharing between the DME and CAS functions. DME ground facilities would be augmented to transmit a CAS time reference signal, in addition to normal DME replies; airborne clocks would be synchronized to the received reference, after correction for the propagation delay obtained by DME techniques. Synchronized CAS participants transmit and receive one-way range and encoded altitude signals for threat evaluation in accordance with the ANTC-117 threat logic. The areas addressed in this study include the impact of time sharing between DME and CAS functions; the impact of various interference mechanisms (fruit, co-slot and adjacent slot occupancy, multipath), and threat parameter measurement accuracies.

• Corporate Authors:

  Institute for Defense Analyses

  400 Army Navy Drive
  Arlington, VA  United States  22202

  Department of Defense

  Advanced Research Projects Agency
  Arlington, VA  United States  22209

  Federal Aviation Administration

  Systems R&D Service, 800 Independence Avenue, SW
  Washington, DC  United States 
• Authors:
  • Krinitz, A
• Publication Date: 1975-10

Media Info

• Pagination: 127 p.

Subject/Index Terms

• TRT Terms: Air traffic control; Aviation safety; Avionics; Crash avoidance systems; Distance measuring equipment; Systems engineering; Threats; Time signals; Traffic signal control systems
• Uncontrolled Terms: Synchronization
• Old TRIS Terms: Airborne equipment; Synchronism; Threat evaluation
• Subject Areas: Aviation; Operations and Traffic Management; Security and Emergencies;

Filing Info

• Accession Number: 00094462
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FAA-RD-75-141 Final Rpt., S-546
• Contract Numbers: DAHC15-73-C-0200
• Files: NTIS, TRIS, USDOT
• Created Date: Apr 21 1976 12:00AM