Accession Number : AD0431914


Title :   EVALUATION OF A GROUND-BOUNCE RANGING/ALTITUDE EXCHANGING COLLISION AVOIDANCE SYSTEM TECHNIQUE.


Descriptive Note : Final rept.,


Corporate Author : NATIONAL AVIATION FACILITIES EXPERIMENTAL CENTER ATLANTIC CITY N J


Personal Author(s) : Dinerman,Bernhart V ; Burkard,Karl


Report Date : Oct 1963


Pagination or Media Count : 362


Abstract : A range/range-rate collision prediction technique, implemented in a breadboard collision avoidance system (CAS), was investigated. The CAS was installed in two JC-131 aircraft, and the effects of terrain and relative velocity on system performance were evaluated during parallel, ascending, descending, divergent, and near collision flights over water, flat land, mountains, and cities. The purposes of the evaluation were to determine capabilities of the system concept, determine limitations of the range/range-rate (tau) technique, and provide data for direction of further development effort. The airborne test results confirm the validity of a collision avoidance technique based upon the tau relationship. However, when range data are derived by the ground reflection technique, inaccuracies due to irregular terrain contour result in false alarms and missed alarms. The principal recommendation is that the tau technique be seriously considered for further application in any new development of a collision avoidance system. (Author)


Descriptors :   AIR TO AIR , AVIATION SAFETY , RANGES(FACILITIES) , RADIO ALTIMETERS , RADIO BEACONS , RADAR , DIPOLES , TRANSPORT AIRCRAFT , WARNING SYSTEMS , RADAR REFLECTIONS , FLIGHT


Distribution Statement : APPROVED FOR PUBLIC RELEASE