The Evaluation of Longitudinal Safety Interval of Different Route Operation

• 1、ATM College, Cival Aviation University of China, TianJin 300300

Abstract：China has begun to take the one-way route mode on the busy route. While the current interval theory for this operation mode is not mature. In order to determine the operation interval of one-way route and the corresponding collision risk, a probability algorithm based on the velocity distribution is studied in the paper. The influence of navigation and positioning tolerance to route safety interval is considered and put forward the collision risk algorithm of three adjacent aircrafts. By establishing the conflict risk model when aircraft ascending and descending through the adjacent flight level, the operation interval and route capacity ensuring the route crossing safety is obtained under the operation mode of one-way route and hybrid route with theoretical derivation and simulation by MATLAB, in the meantime, obtain the collision risk of three adjacent aircrafts. The result shows that under the same collision risk, the safety interval of one-way route is smaller, and one-way operation owns greater route capacity even in the same sector.

Keywords： air transportation safety assessment；probability theory；one-way route and hybrid route longitudinal separation crossing