Collision risk research on crossing track based on PBN

Because PBN(RNAV/RNP) has been implemented in some Chinese routes step by step, and the routes in China are the crossing track mainly, so the stress of the collision risk should be put on the crossing track. The author analyzed deeply the collision risk of intersecting routes based on PBN in this paper. First,the collision risk model of crossing track is built, and the calculating methods are concluded, the influence to the collision risk by the flight separation minima and required navigation performance is analyzed, the minimum separation in given parameters is defined, which offer the theoretical basis for defining the reduced separation minima of the crossing tracks.