PASSIVE RANGING/TRACKING PROCESSING METHOD
First Claim
1. A passive ranging/tracking method for tracking a target, comprising the steps of:
- (a) producing at least a first and a second sets of direction measurements of the target with respect to a carrier from at least a first and second passive sensors through at least a first and second tracking control devices respectively, wherein said two passive sensors are installed on said carrier and each of said passive sensors is controlled by said respective tracking control device to keep pointing to said target;
(b) producing navigation data of said carrier, including position, velocity, and attitude data, using an onboard navigation system;
(c) computing a target range vector measurement of said target with respect to said carrier using said two sets of direction measurements; and
(d) extracting three-dimensional position and velocity information of said target at a current epoch using said target range vector measurement.
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Abstract
A passive ranging/tracking processing method provides information from passive sensors and associated tracking control devices and GPS/IMU integrated navigation system, so as to produce three dimensional position and velocity information of a target. The passive ranging/tracking processing method includes the procedure of producing two or more sets of direction measurements of a target with respect to a carrier, such as sets of elevation and azimuth angles, from two or more synchronized sets of passive sensors and associated tracking control devices, installed on different locations of the carrier, computing the range vector measurement of the target with respect to the carrier using the two or more sets of direction measurements, and filtering the range vector measurement to estimate the three-dimensional position and velocity information of the target.
33 Citations
49 Claims
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1. A passive ranging/tracking method for tracking a target, comprising the steps of:
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(a) producing at least a first and a second sets of direction measurements of the target with respect to a carrier from at least a first and second passive sensors through at least a first and second tracking control devices respectively, wherein said two passive sensors are installed on said carrier and each of said passive sensors is controlled by said respective tracking control device to keep pointing to said target;
(b) producing navigation data of said carrier, including position, velocity, and attitude data, using an onboard navigation system;
(c) computing a target range vector measurement of said target with respect to said carrier using said two sets of direction measurements; and
(d) extracting three-dimensional position and velocity information of said target at a current epoch using said target range vector measurement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49)
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29. A passive ranging/tracking method for tracking a target, comprising the steps of:
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(a) producing at least a first and a second sets of direction measurements of the target with respect to at least a first carrier and a second carrier from at least a first and second passive sensors through at least a first and second tracking control devices respectively, wherein said passive sensors and said tracking control devices are installed on said carriers respectively and each of said passive sensors is controlled by said respective tracking control device to keep pointing to said target;
(b) producing navigation data of said first and second carriers, including position, velocity, and attitude data, using a first onboard navigation system provided on said first carrier and a second onboard navigation system on said second carrier;
(c) computing a target range vector measurement of said target with respect to each of said carriers, using said two or more sets of direction measurements;
wherein said first carrier and said second carrier are data-linked; and
(d) extracting three-dimensional position and velocity information of said target, expressed in a navigation coordinate system, at a current epoch using said target range vector measurement.
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Specification