A technology for evaluating ground station sites on the basis of their effectiveness in disseminating time synchronization has been produced. Analytical studies have complemented the concept of computer modeling of the airspace population, then quantitatively assessing the effectiveness of various configurations and deployment of time disseminating equipments. A unique feature is the ability to evaluate the effectiveness of ground based master stations with and without aircraft hierarchal time synchronization relay. These techniques were applied in making trade-off evaluations of the overall synchronization effectiveness of various levels of airborne vs. ground-based hierarchal time relaying equipage. It is shown that the number of ground-based master stations required to supply a desired level of synchronization coverage to all aircraft (hierarchal and nonhierarchal), increases rapidly as the number of hierarchal aircraft is diminished. Computational capabilities developed during this study include the ability to model total CONUS aircraft population activity as a three-dimensional time variant and to model scheduled aircarrier operations. For a given day and time-of-day, the altitude, latitude and longitude of each aircarrier aircraft is computed. Then, air-to-air and air-to-ground communication linkages are determined. The effectiveness of all potential sites for ground based equipments can be determined and quantitatively compared. These computational and analytic capabilities are directly applicable to assessing the effectiveness and deployment of other ground-based ATC equipments such as surveillance radar, VOR's and TACAN and ATC service demand problems.

  • Supplemental Notes:
    • See also Rept. no. FAA-RD-73-102 dated Jul 73, AD-768 677, Rept. no. FAA-RD-73-173 dated Oct 73, AD-779 538 and Rept. no. FAA-RD-74-117 dated May 74, AD-785 335.
  • Corporate Authors:

    Society of Naval Architects of Japan

    23 Shiba-kotohiracho, Minato-ku
    Tokyo 135,   Japan 
  • Authors:
    • Holt, J M
    • Watson, F D
  • Publication Date: 1974-7

Media Info

  • Pagination: 108 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00150827
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FAA-RD-74-120 Final Rpt.
  • Contract Numbers: DOT-FA73WA-3172
  • Files: NTIS, TRIS
  • Created Date: Mar 30 1977 12:00AM