Covert ranging method and system

Details Covert ranging method and system Covert ranging method and system

1992-07-22

1994-09-13

Black, Thomas G.

Boots, shoes, and leggings

364461, 364423, 235411, G06F 1500

Patent

active

053474694

ABSTRACT:
A method and system for covertly determining and predicting air-to-air target data relative to a predetermined position passively senses the target (84) to produce a passive target data set. Next, the method and system transform (14) the passive target data set to produce a transformed passive data set. Then, the system compares (22) the transformed passive data set to a predicted data set (20) to generate a measurement error. By actively sensing (38 and 40) the target for a minimally detectable period (42) of time to produce an active target data set (28), the system applies constraints (28) and therefrom computes penalties (26) that relate to the measurement error (22) to produce a system error. Then, in response to the system error (24) the method and system compute the direction (30) and magnitude (32) for a perturbation or a response (44) to the predicted target data (18). These steps are repeated to covertly determine target data relative to the predetermined position (16) for improved covert air-to-air ranging.

REFERENCES:
patent: 3935572 (1976-01-01), Broniwitz et al.
patent: 4814994 (1989-03-01), Doane et al.
patent: 4954837 (1990-09-01), Baird et al.
patent: 4959800 (1990-09-01), Wolley
patent: 5095467 (1992-03-01), Olson et al.
patent: 5164910 (1992-11-01), Lawson et al.
Noel Collins and Charles Baird, Terrain Aided Passive Estimation, IEEE 1989 National Aerospace and Electronics Conference Naecon 1989, vol. 2, May 1989, Dayton, Ohio, pp. 906-916, XP76441.

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