The study analyzes two collision avoidance systems (CAS) using RCA SECANT techniques: VECAS designed for high performance aircraft and VECAS-GA designed for low performance aircraft. Both CAS are still undergoing refinement; therefore, the results reported here apply only to the specific versions studied. The two CAS use the Air Transport Association (ATA) collision avoidance logic and were evaluated in the 1971 FAA projection of traffic (800 aircraft) in 1982 in the Los Angeles basin. No attempt was made to evaluate the operational suitability of the ATA logic in the projected traffic. The CAS are asynchronous and employ beacon interrogator/transponder techniques, which introduce mutual interference. In the analysis a thrid equipment, the SECANT Proximity Warning Indicator (PWI), was modeled but not analyzed to determine levels of interference. In the analysis the equipment mix was assumed to be 7 percent VECAS, 21 percent VECAS-GA, and 72 percent PWI in the most dense region below 10,000 ft altitude.

  • Corporate Authors:

    Institute for Defense Analyses

    400 Army Navy Drive
    Arlington, VA  United States  22202

    Federal Aviation Administration

    Systems R&D Service, 800 Independence Avenue, SW
    Washington, DC  United States 

    Department of Defense

    Advanced Research Projects Agency
    Arlington, VA  United States  22209
  • Authors:
    • Bagnall, JJJ
    • KAY, I W
    • Krinitz, A
    • Turner, R D
  • Publication Date: 1973-10

Media Info

  • Pagination: 182 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00094543
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FAA-RD-73-152 Final Rpt., S-426
  • Contract Numbers: DAHC15-73-C-0200
  • Files: NTIS, TRIS, USDOT
  • Created Date: May 14 1976 12:00AM