Aircraft traffic collision avoidance
A collision warning method includes receiving a collision risk indication from a traffic collision avoidance system of an aircraft, receiving a preset altitude, comparing the preset altitude and an altitude associated with the collision risk indication, and providing a warning in the aircraft when the preset altitude and the altitude associated with the collision risk are within a threshold.
1. A collision warning method for a traffic collision avoidance system (TCAS) of a first aircraft comprising:
receiving, within the first aircraft, a current altitude of the first aircraft;
receiving, within the first aircraft, a velocity and a current altitude of a second aircraft, wherein the TCAS is configured to project a collision risk between the first and second aircraft based on the current altitude of the first aircraft and the velocity and current altitude of the second aircraft;
receiving, within the first aircraft, a preset altitude of the first aircraft from the first aircraft and a preset altitude of the second aircraft from the second aircraft;
determining, within the first aircraft, a likelihood of collision between the first and second aircraft based on the preset altitudes;
providing, using the TCAS of the first aircraft, a collision warning when the likelihood of collision exceeds a threshold; and
forgoing the collision warning when the likelihood of collision does not exceed the threshold.
2. The method of claim 1 , wherein determining the likelihood of collision comprises comparing a preset altitude to an altitude associated with the collision risk projected using the current altitude of the first aircraft and the velocity and current altitude of the second aircraft.
3. The method of claim 1 , wherein the current altitude of the second aircraft is different than the preset altitude of the second aircraft.
4. The method of claim 1 , wherein a likelihood of collision exceeds a threshold when two preset altitudes are within a threshold distance.
5. The method of claim 1 , wherein the current altitude of the first aircraft is different than the preset altitude of the first aircraft.
6. An aircraft collision warning system for a first aircraft, the first aircraft at a first altitude, the system comprising a non-transitory machine-readable medium on which are stored instructions that, when executed, cause the system to:
receive a preset altitude of the first aircraft from the first aircraft and a preset altitude of a second aircraft from the second aircraft, wherein the second aircraft is at a velocity and a second altitude, wherein a TCAS of the first aircraft is configured to project a collision risk between the first and second aircraft based on the velocity of the second aircraft, the first altitude, and the second altitude;
determine a likelihood of collision between the first aircraft and the second aircraft based on the preset altitudes;
transmit a collision risk signal when the likelihood of collision is within a threshold; and
forgo transmitting the collision risk signal when the likelihood of collision does not exceed the threshold.
7. The system of claim 6 , wherein determining the likelihood of collision comprises comparing a preset altitude to an altitude associated with the collision risk projected using the current altitude of the first aircraft and the velocity and current altitude of the second aircraft.
8. The system of claim 6 , wherein the current altitude of the second aircraft is different than the preset altitude of the second aircraft.
9. The system of claim 6 , wherein the current altitude of the first aircraft is different than the preset altitude of the first aircraft.
10. The system of claim 6 , wherein determining the likelihood of collision comprises comparing the preset altitudes.
11. The method of claim 1 , wherein determining the likelihood of collision comprises comparing the preset altitudes.
12. The method of claim 3 , wherein determining the likelihood of collision comprises comparing a preset altitude to an altitude-associated with the collision risk projected using the current altitude of the first aircraft and the velocity and current altitude of the second aircraft.
13. The method of claim 3 , wherein a likelihood of collision exceeds a threshold when two preset altitudes are within threshold distance.
14. The method of claim 3 , wherein the current altitude of the first aircraft is different than the preset altitude of the first aircraft.
15. The method of claim 3 , wherein determining the likelihood of collision comprises comparing the preset altitudes.
16. The system of claim 6 , wherein a likelihood of collision exceeds a threshold when two preset altitudes are within a threshold distance.
17. The system of claim 8 , wherein the likelihood of collision comprises comparing a preset altitude to an altitude associated with the collision risk projected using the current altitude of the first aircraft and the velocity and current altitude of the second aircraft.
18. The system of claim 8 , wherein the current altitude of the first aircraft is different than the preset altitude of the first aircraft.
19. The system of claim 8 , wherein determining the likelihood of collision comprises comparing the preset altitudes.
20. The system of claim 8 , wherein a likelihood of collision exceeds a threshold when two preset altitudes are within a threshold distance.