Synthetic aperture radar
First Claim
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1. A synthetic aperture radar system comprising:
- (a) means for generating raw synthetic aperture radar data;
(b) means for(i) processing the raw data on the basis of trial across-track platform accelerations to obtain successive estimates of that acceleration,(ii) correcting the phase and range of the raw data in accordance with across-track position and velocity obtained from successive acceleration estimates, and(iii) correlating phase-corrected raw data on the basis of reference functions selected in accordance with corrected range to provide image data; and
(c) means for storing and/or displaying the image data as a function of azimuth and corrected range.
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Abstract
A synthetic aperture radar system includes a distortion correction device arranged for autofocussing of raw data by contrast maximization. Reference functions are selected on the basis of a range of trial accelerations. The acceleration producing the highest contrast is taken as the current radar platform across-track acceleration. This information is used to generate phase and range corrections for the data.
32 Citations
7 Claims
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1. A synthetic aperture radar system comprising:
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(a) means for generating raw synthetic aperture radar data; (b) means for (i) processing the raw data on the basis of trial across-track platform accelerations to obtain successive estimates of that acceleration, (ii) correcting the phase and range of the raw data in accordance with across-track position and velocity obtained from successive acceleration estimates, and (iii) correlating phase-corrected raw data on the basis of reference functions selected in accordance with corrected range to provide image data; and (c) means for storing and/or displaying the image data as a function of azimuth and corrected range. - View Dependent Claims (6, 7)
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2. A synthetic aperture radar system comprising:
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(a) means for generating raw synthetic aperture radar data; (b) means for (i) processing the raw data on the basis of trial across-track platform accelerations to obtain successive estimates of that acceleration, (ii) correcting the phase and range of the raw data in accordance with acrosstrack position and velocity obtained from successive acceleration estimates, and (iii) correlating phase-corrected raw data on the basis of reference functions selected in accordance with corrected range to provide image data; and (c) means for storing and/or displaying the image data as a function of azimuth and corrected range wherein said system includes means for rotating and translating an image of a scene into registration with a different image of that scene. - View Dependent Claims (3, 4, 5)
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Specification