“…However, to overcome the drawbacks of poor real-time, complex algorithms of FADS [2,3,4] , a new kind of FADS based on the acoustic vector sensors, instead of pressure sensors, is proposed to measure atmospheric parameters more accurately and quickly. At both subsonic and supersonic conditions, Chen cheng and Zen bin [5,6] have measured airflow velocity with acoustic vector sensors at a point on vehicle' surface in theory. however, to estimate the velocity and direction of the free far field flow, a new model of airflow velocity distribution over vehicle must be developed.…”