Accession Number:

ADA058936

Title:

Experimental BCAS Performance Results.

Descriptive Note:

Interim rept. Apr 75-May 78,

Corporate Author:

TRANSPORTATION SYSTEMS CENTER CAMBRIDGE MASS

Report Date:

1978-07-01

Pagination or Media Count:

400.0

Abstract:

The results of the Litchford Beacon-based Collision Avoidance System concept feasibility evaluation are reported. Included are a description of the concept, analysis and flight test results. The system concept is based on the range and bearing measurements for detecting and resolving a threat. The experimental hardware, developed under Contract No. DOT-TSC-1103, Task 1-8, did not implement the automatic radar selection and lock-on mode and the capability to compute target range and bearing in real time which the concept requires. These enhancements are currently being implemented. All three generic modes of the BCAS were evaluated. These are the passive listen-in, the active interrogate by on-board transmitter, and the combined active-passive. Also, reported are results are results of the comprehensive in-house study effort conducted on the azimuth signal requirements and on single-site feasibility. It is concluded that the BCAS is a technically feasible concept and that the passive mode with an azimuth reference signal would be more accurate and less troublesome than other BCAS alternatives. For each operating mode there are geometries in which system performance fails or is degraded to some degree. System reliability may therefore require the implementation of various operating modes. Author

Subject Categories:

  • Flight Control and Instrumentation
  • Air Navigation and Guidance
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE