| 摘要 |
<p>In one aspect, a method includes sending an interrogation request using an omni-directional antenna at a secondary surveillance radar, receiving, from responding aircraft, interrogation responses comprising identity and altitude, determining a distance to each of the responding aircraft based on a time the interrogation request was sent and a time an interrogation response was received, receiving, from a primary radar, positions of tracks, correlating the distances of each responding aircraft with the positions of the tracks to form a set of candidates by position; and sending identity, altitude and position of a track if there is one candidate from the set of candidates.</p> |
