1. COMPUTER SCIENCE AND AIRPLANES - TRAFFIC COLLISION AVOIDANCE SYSTEM (TCAS) YIXIN ZENG

2. FIRST CIVIL AIR COLLISON AVIATION TRAGEDY CAUSE >100 DEATH GRAND CANYON MID-AIR COLLISION IN 1956.

3. THE 1956 GRAND CANYON MID-AIR COLLISION A United Airlines Douglas DC-7 From: Flight originLos Angeles Int'l Airport DestinationChicago Midway AirportKansas City Downtown Airport Passenger / crew53/564/6 A Trans World Airlines Lockheed L-1049,

4. FIRST GENERATION TCAS Ⅰ THEORY ： INTERROGATES OTHER AIRCRAFT OTHER AIRCRAFT REPLY TO OTHER INTERROGATIONS AIR COMPUTER: CALCULATE AND NOTICE PILOT POTENTIAL AIR COLLISION VIA AIRSPEED, ALTITUDE, DIRECTION, PROMOTION AND DEMOTION RATIO,

5. TCAS Ⅱ  Give RA solution  coordinate resolution before issue to commands  TA, RA, region

6. BOTH CONCEPT AND NOT IMPLEMENT TCAS Ⅲ TRY TO GENERATE A HORIZONTAL MANEUVER TCAS Ⅳ SIMILAR THEORY WITH ADS-B TCAS Ⅲ & TCAS Ⅳ

7. WINDSHEAR DETECTION GROUND PROXIMITY WARNING SYSTEM (GPWS) ALERTS AIR TRAFFIC CONTROL (ATC) INSTRUCTIONS --- JULY 1, 2002 ÜBERLINGEN DISASTER PRIORITY

8. CURRENT LIMITATIONS TCAS2 ONLY PROVIDE VERTICAL ADVISORIES INDEPENDENCE SYSTEM LACK OF TERRAIN/GROUND AND OBSTACLE AWARENESS UNIT, NOT INTUITIVE

9. THANKS QUESTION ？