Synthetic aperture radar system having a third order tuned auto

Details Synthetic aperture radar system having a third order tuned auto Synthetic aperture radar system having a third order tuned auto

1989-11-28

1991-04-30

Barron, Jr., Gilberto

Communications: directive radio wave systems and devices (e.g.,

Synthetic aperture radar

G01S 1390

Patent

active

050122495

ABSTRACT:
In a SAR system a method is provided for compensating for antenna residual motion relative to a motion sensor, wherein such residual motion causes phase corruption in a radar image produced by the SAR system. Residual motion compensation is provided by first correlating a received radar signal to a range line having a plurality of azimuth positions. Such signal is transformed into a frequency spectrum indicating the reflectivity of point reflectors at the various azimuth positions. Then, the range line is sampled for symmetric sets of sequential point reflectors positioned along the range line at a consecutive distance from each other corresponding to a specified frequency associated to a mode of residual vibration of the antenna. The amplitude and phase angle of said mode of the antenna residual motion may be obtained from such symmetric sets.

REFERENCES:
patent: 4134113 (1979-01-01), Powell
patent: 4617567 (1986-10-01), Chan
patent: 4771287 (1988-09-01), Mims
patent: 4837577 (1989-06-01), Peregrim et al.

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