1. (264) Air data computers guage an aircraft's "true" airspeed, altitude and vertical speed.

2. No evidence of systematic reliability checks on AIR data or checks on information received following ad-hoc requests.

3. According to the air data of UAV, UAV image was preconditioned, which can reduce the range for searching feature point.

4. Other improvement includes domestic newly designed CW-1002 air data sensor developed in conjunction with the Western avionics, and WP-7B/WP-7BM engine.

5. SESAR will therefore set up an efficient network of ground-to-air data links, enabling in particular the accurate 'trajectory" information exchanges referred to above.

6. Traditional gyroscopic flight instruments have been replaced by electronic attitude and heading reference systems (AHRS) and air data computers (ADCs), improving reliability and reducing cost and maintenance.