Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar
Patent
1992-12-31
1995-07-04
Sotomayor, John B.
Communications: directive radio wave systems and devices (e.g.,
Synthetic aperture radar
342 62, 342 64, G01S 1390
Patent
active
054304458
ABSTRACT:
A synthetic aperture radar guidance system adapted for use in a guided missile is described wherein the frequency of the transmitted pulses changes with time with a chirp slope which varies with range. The time between pulses also changes as a function of range. The desired values of the chirp slope and the interpulse interval are computed for all values within a range of interest and stored. Furthermore, the operating parameters of the SAR are changed as the range changes. The time intervals and frequencies are selected to avoid interruption ambiguities and eclipsing. The phase and frequency of the synthesized signal are controlled to adjust for motion of a vehicle on which the SAR is mounted. The SAR is operated in several modes. In a search mode, the beam of transmitted pulses is steered across a mapping area to form a plurality of patches of the mapping area. The patches are combined into one map of the entire area. Each pixel of the map is compared with a target template until a match is provided. Then the SAR operates in track mode wherein a correlation process ensures the missile is steered toward the target area using a template provided using known feature data.
REFERENCES:
patent: 4034370 (1977-07-01), Mims
patent: 4084158 (1978-04-01), Slawsby
patent: 4217583 (1980-08-01), Hiller et al.
patent: 4355311 (1982-10-01), Jain
patent: 4387373 (1983-06-01), Longuemare, Jr.
patent: 4559537 (1985-12-01), Pearson et al.
patent: 4617567 (1986-10-01), Chan
patent: 4771287 (1988-09-01), Mims
patent: 4837577 (1989-06-01), Peregrim et al.
patent: 4881079 (1989-11-01), Peregrim
patent: 5018218 (1991-05-01), Pergrim et al.
patent: 5083130 (1992-01-01), Cardiasmenos
patent: 5260709 (1993-11-01), Nowakowski
patent: 5341142 (1994-08-01), Reis et al.
patent: 5341143 (1994-08-01), Reis et al.
"Digital versus optical in synthetic aperture radar (SAR) data processing," D. A. Ausherman, Optical Engineering, vol. 19, No. 2, Mar./Apr. 1980, pp. 157-167.
"SAR digital image-formation processing," D. A. Ausherman, SPIE vol. 528 Digital Image Processing (1985) pp. 118-133.
"Motion-Compensated SAR Image ISLR," P. L. Bogler, IEEE Transactions on Geoscience & Remote Sensing, vol. GE-25, Nov. 1987, No. 6, New York, NY, pp. 871-878.
"Synthetic Aperture Radar," L. J. Cutrona, Radar Handbook, McGraw-Hill Publishing Company, Second Edition, pp. 21.1-21.23.
Long Albert H.
Okurowski Frank A.
Peregrim Theodore J.
Dawson Walter F.
Mofford Donald F.
Raytheon Company
Sotomayor John B.
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