[특허]System and method for detecting use of booster rockets by ballistic missiles

Lockheed Martin Corporation

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

System and method for detecting use of booster rockets by ballistic missiles

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01S-007/42 G01S-013/00 G06G-007/80 G01S-013/72
미국특허분류(USC)	342/095; 342/013; 342/090; 342/094; 235/400; 235/411; 235/412; 235/413; 235/417
출원번호	US-0967149 (2010-12-14)
등록번호	US-8963765 (2015-02-24)
발명자 / 주소	Pedersen, Richard N.
출원인 / 주소	Lockheed Martin Corporation
대리인 / 주소	Howard IP Law Group, PC
인용정보	피인용 횟수 : 3 인용 특허 : 30

초록

A method for tracking an object using radar includes detecting a wideband radio frequency (“RF”) energy at a first radar sensor tracking the object and determining in a computer process if a booster is propelling the object based on the wideband RF energy. The object is tracked in a computer process based on a ballistic trajectory if the booster is not propelling the object, and the object is tracked in a computer process based on a non-ballistic trajectory if the booster is propelling the object.

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1. A computer implemented method for tracking an object using radar, the method comprising: a) receiving, in a processor of the computer, data representing a wideband radio frequency (RF) energy level of the object detected at a first radar sensor;b) comparing, by the processor of the computer, the data representing the wideband RF energy level detected to a predetermined non-zero threshold energy level value and determining, by the processor of the computer, if a booster is propelling the object based solely on the comparison of the data representing the wideband RF energy level detected by the first radar sensor to the predetermined non-zero threshold energy level value;c) responsive to a determination that the booster is not propelling the object, tracking, using a computer processor, the object at a first rate according to a ballistic trajectory; andd) responsive to a determination that the booster is propelling the object, tracking using a computer processor, the object at a second rate that is greater than the first rate according to a non-ballistic trajectory. 2. The method of claim 1, wherein tracking the object according to a ballistic trajectory includes: i) transmitting an electronically steered first phased-arrayed signal in a direction associated with an estimated position of the object;ii) receiving a reflection of the first phased-arrayed signal;iii) processing the reflection of the first phased-arrayed signal to determine at least one of a velocity and a position of the object;iv) calculating an updated estimated position of the object based on the processed reflection; andrepeating steps i), ii), iii), and iv) at the first rate. 3. The method of claim 2, wherein tracking the object according to a non-ballistic trajectory includes: v) transmitting an electronically steered second phased-arrayed signal in a direction associated with an estimated position of the object;vi) receiving a reflection of the second phased-arrayed signal;vii) processing the reflection of the second phased-arrayed signal to determine at least one of a velocity and a position of the object;viii) calculating an updated estimated position of the object based on the processed reflection; andix) repeating steps v), vi), vii) and viii) at the second rate that is greater than the first rate. 4. The method of claim 1, further comprising allocating at least one resource used to track the object to track a second object if the booster is not propelling the object. 5. The method of claim 1, wherein determining if the booster is propelling the object includes: i) measuring the wideband RF energy level;ii) comparing the measured wideband RF energy level to a threshold RF energy level; andiii) identifying that the booster is propelling the object if the measured energy is greater than or equal to the threshold RF energy level. 6. A radar system comprising: at least one radar sensor configured for transmitting and receiving phased-arrayed signals;a computer readable storage medium; anda processor in signal communication with the at least one radar sensor and the computer readable storage medium, the processor configured for: comparing data representing the wideband radio frequency (RF) energy level detected to a non-zero threshold energy level value stored in the computer readable storage medium and determining if a first object is being propelled by a booster based solely on the comparison of the wideband radio frequency (RF) energy level received at the at least one radar sensor to the non-zero threshold energy level value;tracking the object by the processor repeating the steps of: transmitting a signal to the radar sensor that when received by the radar sensor causes the radar sensor to transmit an electronically steered beam;receiving a reflected signal from the radar sensor;processing the reflected signal to calculate at least one of a position, a velocity and an acceleration of the object:calculating an updated position of the object based on the processed reflected signal; andtransmitting a signal to the radar sensor that when received by the radar sensor, causes the radar sensor to transmit the electronically steered beam toward the updated position, wherein calculating the updated position is based on a ballistic trajectory responsive to a determination that the booster is not propelling the object; andcalculating the updated position is based on a non-ballistic trajectory responsive to a determination that the booster is propelling the object. 7. The radar system of claim 6, wherein repeating the steps of tracking the object occurs at a first rate if it is determined that a booster is not propelling the object. 8. The radar system of claim 7, wherein repeating the steps of tracking the object occurs at a second rate which is greater than the first rate, if it is determined that a booster is propelling the object. 9. The radar system of claim 6, wherein the processor is configured to allocate at least one resource used to track the first object to track a second object if the booster is not propelling the first object. 10. A method for tracking an object using radar, the method comprising: a) transmitting a first phased-arrayed signal from at least one radar sensor;b) receiving a reflection of the first phased-arrayed signal at the at least one radar sensor;c) analyzing the reflection of the first phased-arrayed signal in a computer process to determine at least one of a velocity and a position of the object;d) detecting by a computer processor wideband radio frequency (RF) energy level at the at least one radar sensor tracking the object;e) comparing, by the computer processor, the data representing the wideband RF energy level detected to a non-zero threshold energy level value and determining if a booster is propelling the object based solely on the comparison of the wideband RF energy level to the non-zero threshold RF energy level value;f) tracking the object by, in the processor of the computer, repeating the steps of: transmitting a signal to the radar sensor that when received by the radar sensor causes the radar sensor to transmit an electronically steered beam;receiving a reflected signal from the radar sensor;processing the reflected signal to calculate at least one of a position, a velocity and an acceleration of the object;calculating an updated position of the object based on the processed reflected signal; andtransmitting a signal to the radar sensor that when received by the radar sensor, causes the radar sensor to transmit the electronically steered beam toward the updated position, whereincalculating the updated position is based on a ballistic trajectory responsive to a determination that the booster is not propelling the object; andcalculating the updated position is based on a non-ballistic trajectory responsive to a determination that the booster is propelling the object. 11. The method of claim 10, wherein if it is determined that a booster is not propelling the object, repeating the steps of tracking the object at a first rate, if it is determined that a booster is propelling the object, repeating the steps of tracking the object at a second rate. 12. The method of claim 11, wherein the first rate is slower than the second rate. 13. The method of claim 10, further comprising: g) allocating at least one resource used to track the object to track a second object if the booster is not propelling the first object. 14. The method of claim 10, wherein determining if the booster is propelling the object includes: i) measuring the wideband RF energy level;ii) comparing the measured wideband RF energy level to a threshold energy level; andiii) identifying that the booster is propelling the object if the measured energy level is greater than or equal to the threshold energy level. 15. The method of claim 10, wherein tracking the object based on a non-ballistic trajectory includes: determining a velocity, an acceleration, and a location of the object in three dimensions;calculating an estimated location of the object at a time in the future; andtransmitting a second phased-arrayed signal from the at least one radar sensor in a second direction that is different from a first direction in which the first phased-arrayed signal was transmitted, the second direction based on the estimated location of the object.

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System and method for detecting use of booster rockets by ballistic missiles

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