System and method for identifying incursion threat levels

• US 7,932,853 B1
• Filed: 09/12/2008
• Issued: 04/26/2011
• Est. Priority Date: 09/12/2008
• Status: Active Grant

• Current Assignee: Rockwell Collins, Inc. (Raytheon Technologies Corporation d/b/a RTX)
• Original Assignee: Rockwell Collins, Inc. (Raytheon Technologies Corporation d/b/a RTX)
• Inventors: McCusker, Patrick D., Woodell, Daniel L., Jinkins, Richard D.
• Primary Examiner(s): Sotomayor; John B
• Application Number:
  US12/210,061
• Time in Patent Office: 956 Days
• Field of Search: 342/26.R, 342/26.B, 342/26.D, 342/29, 342/33, 342/36
• US Class Current: 342/26.00B
• CPC Class Codes: G01S 13/87 Combinations of radar systems, e.g. primary radar and secondary radar
• CPC Class Codes: G01S 13/931 of land vehicles
• CPC Class Codes: G01S 13/953 mounted on aircraft
• CPC Class Codes: G01S 7/10 Providing two-dimensional and co-ordinated display of distance and direction
• CPC Class Codes: G08G 5/0021 located in the aircraft
• CPC Class Codes: G08G 5/0052 for cruising combined instruments indicating more than one navigational value G01C23/00
• CPC Class Codes: G08G 5/0078 for monitoring traffic from the aircraft radar or analogous systems specially adapted for traffic control G01S13/91
• CPC Class Codes: G08G 5/025 Navigation or guidance aids radar or analogous systems specially adapted for landing purposes G01S13/913
• CPC Class Codes: G08G 5/065 Navigation or guidance aids, e.g. for taxiing or rolling
• CPC Class Codes: Y02A 90/10 Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Abstract

An aircraft weather radar system for displaying an indication of a threat level presented by an obstacle to the aircraft on an electronic display. The weather radar system includes a radar antenna configured to receive radar returns from a radar sweep. The weather radar system additionally includes processing electronics configured to determine a movement vector of the obstacle using the radar returns. The processing electronics are further configured to determine the threat level of the obstacle to the aircraft based on the determined movement vector, to generate parameters for an indication based on the determined threat level and to cause the indication to be displayed on an electronic display.

Claims

1. A weather radar system for use on an aircraft and for displaying an indication of a threat level presented by an obstacle to the aircraft on an electronic display, the weather radar system having a radar antenna configured to receive radar returns from a radar sweep, comprising:

processing electronics configured to determine a movement vector of the obstacle using the radar returns, the processing electronics further configured to determine the threat level of the obstacle to the aircraft based at least in part on acceleration of the obstacle determined from the movement vector, the processing electronics further configured to use the threat level to generate the indication, the processing electronics further configured to cause the indication to be displayed on the electronic display.

2. The aircraft weather radar system of claim 1, wherein the threat level is used to confirm or invalidate a previously existing threat level indication.

3. The aircraft weather radar system of claim 1, wherein the movement vector comprises position, and closing velocity of the obstacle relative to the aircraft.

4. The aircraft weather radar system of claim 1, wherein the movement vector comprises absolute position, direction, and speed data of the obstacle.

5. The aircraft weather radar system of claim 4, wherein the acceleration is calculated from present and previous velocity data.

6. The aircraft weather radar system of claim 1, wherein the obstacle is at least one of another aircraft, a ground vehicle, or an airport structure.

7. The aircraft weather radar system of claim 5, wherein the movement vector is used to determine whether the obstacle is stationary, taxiing, taking off, or landing.

8. The aircraft weather radar system of claim 1, wherein determining the threat level of the obstacle to the aircraft comprises determining whether or not the obstacle is predicted to or does incur with the aircraft on a runway.

9. The aircraft weather radar system of claim 1, wherein the threat level represents at least one of a low threat level, a medium threat level, and a high threat level, the processing electronics being configured to change the indication based on the low, medium, or high threat level.

10. The aircraft weather radar system of claim 9, wherein the low threat level represents proximity but not predicted incursion, the medium threat level represents possible incursion but not immediately or directly affecting the aircraft, and the high threat level represents a predicted or actual incursion having a direct or immediate affect on the aircraft.

11. A method for displaying an indication of a threat level presented by an obstacle to an aircraft on an electronic display, comprising:

receiving radar returns from a radar sweep by a weather radar system;

determining a movement vector of the obstacle using the radar returns;

determining the threat level of the obstacle to the aircraft based at least in part on acceleration of the obstacle determined from the movement vector;

using the threat level to generate the indication; and

causing the indication to be displayed on the electronic display.

12. The method of claim 11, further comprising:

using the threat level to confirm or invalidate a previously existing threat level indication.

13. The method of claim 11, wherein the movement vector comprises position, and closing velocity data of the obstacle relative to the aircraft.

14. The method of claim 11, wherein the movement vector comprises absolute position, direction, and speed of the obstacle.

15. The method of claim 11, wherein the obstacle is at least one of another aircraft, a ground vehicle, and an airport structure.

16. The method of claim 15, further comprising:

using the movement vector to determine whether the obstacle is stationary, taxiing, taking off, or landing.

17. The method of claim 11, wherein determining the threat level of the obstacle to the aircraft comprises determining whether or not the obstacle is predicted to or does incur with the aircraft on a runway.

18. The method of claim 11, wherein the threat level represents at least one of a low threat level, a medium threat level, and a high threat level, the indication being changed based on the low, medium, or high threat level.

19. The method of claim 18, wherein the low threat level represents proximity but not predicted incursion, the medium threat level represents possible incursion but not immediately or directly affecting the aircraft, and the high threat level represents a predicted or actual incursion having a direct or immediate affect on the aircraft.

20. An apparatus for displaying an indication of a threat level presented by an obstacle to an aircraft on an electronic display, comprising:

means for receiving radar returns from a radar sweep by a weather radar system;

means for determining a movement vector of the obstacle using the radar returns;

means for determining the threat level of the obstacle to the aircraft based at least in part on an acceleration associated with the determined movement vector;

means for using the determined threat level to generate parameters for the indication; and

means for causing the indication to be displayed on the electronic display.