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

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