Because of far distance and fast speed of near space high speed aircraft flight

single sensor detectability on target is limited. In order to improve real-time detectability

effective method is multi-sensor fusion detection. Analyze change condition of radar cross section（ RCS） with sensor frequency while target at different pitching and azimuth angles

respectively simulate integrity rate detection of trace point in

X band

P band

and C Band

and integrity rate detection of radar networking collaborative detection system of trace point is simulated. The results show that the distributed radar networking collaborative detection method can effectively improve detection probability.