Title :
ADS-Mode S system overview
Author :
Boisvert, Robert E. ; Orlando, Vincent A.
Author_Institution :
Lincoln Lab., MIT, Lexington, MA, USA
Abstract :
ADS-Mode S is a system concept that merges the capabilities of Automatic Dependent Surveillance and the Mode S beacon radar. The result is an integrated system for seamless surveillance and data link that permits equipped aircraft to participate in ADS or beacon ground environments. This offers many possibilities for transitioning from a beacon to an ADS based surveillance system. The ADS-Mode S concept is based on the use of the Mode S squirter. The current Mode S squirter is a spontaneous, periodic (once per second) 56-bit broadcast message containing the Mode S 24-bit address. This broadcast is provided by all Mode S transponders and is used by the Traffic Alert and Collision Avoidance System (TCAS) to acquire nearby Mode S equipped aircraft. For ADS-Mode S use, this squitter broadcast would be extended to 112 bits to provide for the transmission of a 56-bit ADS message field. The ADS squitter would be transmitted in addition to the current TCAS squirter in order to maintain compatibility with current TCAS equipment during transition
Keywords :
air-traffic control; aircraft communication; data communication equipment; data communication systems; radar equipment; radionavigation; transponders; 56-bit broadcast message; ADS-Mode S; Automatic Dependent Surveillance; Collision Avoidance System; Mode S beacon radar; Mode S squirter; Mode S transponders; Traffic Alert; air-air surveillance; air-ground surveillance; compatibility; data link; data link transponder; seamless surveillance; Air traffic control; Aircraft navigation; Collision avoidance; Fans; Global Positioning System; Laboratories; Satellite broadcasting; Satellite navigation systems; Surveillance; Transponders;
Conference_Titel :
Digital Avionics Systems Conference, 1993. 12th DASC., AIAA/IEEE
Conference_Location :
Fort Worth, TX
Print_ISBN :
0-7803-1343-7
DOI :
10.1109/DASC.1993.283562
