The Single-Site Collision Avoidance System (SS-CAS),
Abstract
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 16, 1977
- Accession Number
- ADA045977
Entities
People
- L. Schuchman
- R. Orr