Airspace separation control and collision avoidance
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01S-001/00
G01S-003/02
출원번호
US-0666298
(2005-11-07)
등록번호
US-7479923
(2009-01-20)
우선권정보
GB-0424491.9(2004-11-05)
국제출원번호
PCT/GB05/004283
(2005-11-07)
§371/§102 date
20070425
(20070425)
국제공개번호
WO06/048674
(2006-05-11)
발명자
/ 주소
Carpenter,Kenneth Michael
출원인 / 주소
Qinetiq Limited
대리인 / 주소
McDonnell Boehnen Hulbert & Berghoff LLP
인용정보
피인용 횟수 :
9인용 특허 :
2
초록▼
The invention provides methods for validating a position of an airborne platform, by comparing rate of change of a measure of barometric altitude with rate of change of a measure of geometric altitude. When the difference in rates of change exceeds at least one predetermined threshold an indication
The invention provides methods for validating a position of an airborne platform, by comparing rate of change of a measure of barometric altitude with rate of change of a measure of geometric altitude. When the difference in rates of change exceeds at least one predetermined threshold an indication is provided that a threshold has been exceeded. The methods may be employed onboard an aircraft and/or at an air traffic control site, provided the aircraft transmits the necessary parameters. The comparison not only provides validation of vertical positioning information (altitude) but also horizontal positioning information. Corresponding apparatus, systems, programs for computers, and communications signals are also provided.
대표청구항▼
The invention claimed is: 1. A method of analysing position data relating to an airborne platform, the method comprising: providing an indication of reliability of position data relating to the airborne platform responsive to a comparison between one or more predetermined thresholds and the differe
The invention claimed is: 1. A method of analysing position data relating to an airborne platform, the method comprising: providing an indication of reliability of position data relating to the airborne platform responsive to a comparison between one or more predetermined thresholds and the difference between a measure of rate of change of pressure altitude and a measure of rate of change of geometric altitude in which the comparison is made based on the relationship: in which: T is the air temperature, T* is the air temperature in the standard atmosphere, ω is the rate of change of pressure altitude, w is the rate of change of geometric altitude ƒ is the Coriolis parameter g is gravitational acceleration s is the air speed of the aircraft, and σ is the crosswind experienced by the aircraft. 2. A method according to claim 1 in which the indication is provided responsive to which of the at least one thresholds has been exceeded. 3. A method according to claim 1 in which the indication is indicative of which of the at least one thresholds has been exceeded. 4. A method according to claim 1 in which the difference is calculated responsive to a measure of at least one of the airspeed of the airborne platform and the crosswind experienced by the airborne platform. 5. A method according to claim 1, in which the method is performed onboard the airborne platform. 6. A method according to claim 1 in which the indication comprises an indication of a reduction in reliability of position information relating to the airborne platform. 7. A method according to claim 6 in which the position information comprises an indication of a reduction in reliability of horizontal positioning information relating to the airborne platform. 8. A method according to claim 7 in which the position information comprises an indication of a reduction in reliability of vertical positioning information relating to the airborne platform. 9. A method according to claim 1 in which the indication is transmitted from the airborne platform. 10. A method according to claim 1 in which the indication comprises an aural or visual alarm indication. 11. A method according to claim 1 in which the indication is an alarm to a person onboard the airborne platform. 12. A method according to claim 1 in which the airborne platform is an aircraft. 13. Apparatus for validating a position of an airborne platform, the apparatus comprising: first apparatus for determining a measure of rate of change of barometric altitude of the airborne platform; second apparatus for determining a measure of rate of change of geometric altitude of the airborne platform; third apparatus for providing an indication responsive to a comparison between the difference in measures of rates of change and at least one predetermined threshold in which the comparison is made based on the relationship: in which: T is the air temperature, T* is the air temperature in the standard atmosphere, ω is the rate of change of pressure altitude, w is the rate of change of geometric altitude ƒ is the Coriolis parameter g is gravitational acceleration s is the air speed of the aircraft, and σ is the crosswind experienced by the aircraft. 14. A transmitter arranged to transmit position information relating to an airborne platform, the transmitter comprising at least one apparatus according to claim 13. 15. A transponder comprising a transmitter according to claim 14. 16. An airborne platform comprising at least one apparatus for validating a position of an airborne platform, the apparatus including: first apparatus for determining a measure of rate of change of barometric altitude of the airborne platform; second apparatus for determining a measure of rate of change of geometric altitude of the airborne platform; and third apparatus for providing an indication responsive to a comparison between the difference in measures of rates of change and at least one predetermined threshold, in which the comparison is made based on the relationship: in which; T is the air temperature, T* is the air temperature in the standard atmosphere, ω is the rate of change of pressure altitude, w is the rate of change of geometric altitude ƒ is the Coriolis parameter g is gravitational acceleration s is the air speed of the aircraft, and σ is the crosswind experienced by the aircraft a transmitter arranged to transmit position information relating to an airborne platform, and a transponder according to claim 15. 17. An air traffic control system comprising at least one apparatus for validating a position of an airborne platform, the apparatus including: first apparatus for determining a measure of rate of change of barometric altitude of the airborne platform; second apparatus for determining a measure of rate of change of geometric altitude of the airborne platform; and third apparatus for providing an indication responsive to a comparison between the difference in measures of rates of change and at least one predetermined threshold, in which the comparison is made based on the relationship: in which: T is the air temperature, T* is the air temperature in the standard atmosphere, ω is the rate of change of pressure altitude, w is the rate of change of geometric altitude ƒ is the Coriolis parameter g is gravitational acceleration s is the air speed of the aircraft, and σ is the crosswind experienced by the aircraft and a transmitter according to claim 14. 18. A method of controlling the flight path of an airborne platform, the method comprising controlling the airborne platform responsive to a comparison between a difference between a rate of change of pressure altitude and a rate of change of geometric altitude associated with the airborne platform and at least one predetermined threshold in which the comparison is made based on the relationship: in which; T is the air temperature, T* is the air temperature in the standard atmosphere, ω is the rate of change of pressure altitude, w is the rate of change of geometric altitude ƒ is the Coriolis parameter g is gravitational acceleration s is the air speed of the aircraft, and σ is the crosswind experienced by the aircraft. 19. A method according to claim 18 in which the airborne platform is controlled by crew onboard the airborne platform. 20. A method of air traffic control comprising directing the flight path of an airborne platform responsive to a comparison between the difference between a rate of change of pressure altitude and a rate of change of geometric altitude associated with the airborne platform and at least one predetermined threshold in which the comparison is made based on the relationship: in which: T is the air temperature, T* is the air temperature in the standard atmosphere, ω is the rate of change of pressure altitude, w is the rate of change of geometric altitude ƒ is the Coriolis parameter g is gravitational acceleration s is the air speed of the aircraft, and σ is the crosswind experienced by the aircraft. 21. A method according to claim 20 in which the airborne platform transmits an indication that the difference between a rate of change of pressure altitude and a rate of change of geometric altitude associated with the airborne platform has exceeded at least one predetermined threshold. 22. A method according to claim 20 in which the rate of change of difference between pressure altitude and geometric altitude associated with the airborne platform is calculated remotely from the airborne platform. 23. A method according to claim 22 in which an indication generated responsive to the comparison is transmitted to the airborne platform. 24. A program for a computer, the program being arranged to perform the steps of: providing an indication of reliability of position data relating to the airborne platform responsive to a comparison between one or more predetermined thresholds and the difference between a measure of rate of change of pressure altitude and a measure of rate of change of geometric altitude in which the comparison is made based on the relationship: in which: T is the air temperature, T* is the air temperature in the standard atmosphere, ω is the rate of change of pressure altitude, w is the rate of change of geometric altitude ƒ is the Coriolis parameter g is gravitational acceleration s is the air speed of the aircraft, and σ is the crosswind experienced by the aircraft.
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이 특허에 인용된 특허 (2)
Muller Hans R. (Redmond WA), Method and apparatus for correcting dynamically induced errors in static pressure, airspeed and airspeed rate.
Servat Thierry (Bordeaux FRX) Sicre Jean-Luc (Fontenay aux Roses FRX), Method and device for the monitoring and guidance of an aircraft for precision landing.
Breen, Thomas J.; Smith, Alexander E.; Rossano, Christopher F., Extension of aircraft tracking and positive identification from movement areas into non-movement areas.
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