Estimation and Correction of Error in Synthetic Aperture Radar
AssigneeThe Boeing Company
InventorKwang M. Cho
Life of this patent
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Abstract
Methods, systems, and computer-readable media are disclosed for correcting synthetic aperture radar data to correct for gain errors in fast time. According to an embodiment, input data is received from a synthetic radar system representing returned data from an individual pulse. Data entropy optimization is performed to identify a gain correction configured to adjust the input data to minimize image intensity entropy to generate focused output data. The gain correction is applied to the input data to adjust data values in the input data to generate the focused output data.
Claims21
A method, comprising:
- receiving input data from a synthetic radar system, the input data representing returned data responsive to an individual pulse;
- performing data entropy optimization to identify a gain correction to adjust the input data to minimize image intensity entropy;
- applying the gain correction to the input data to adjust data values in the input data to generate the focused output data.
A system, comprising:
- a synthetic aperture radar (SAR) imaging system configured to receive SAR image data;
- a first entropy optimizer configured to receive the SAR image data and to generate phase-corrected image data;
- and
- a second entropy optimizer configured to receive the phase-corrected image data and to generate a gain correction that is applied to the phase-corrected image data to generate focused output data.
A computer-readable medium having computer executable components, the computer executable components comprising:
- a data interface configured to receive image data from a synthetic aperture radar system;
- a phase correction module configured to correct a phase error in focusing the image data in fast time to generate phase-corrected image data;
- and
- a gain correction module configured to correct a gain error in focusing the phase-corrected image data for the gain error in fast time and to generate focused image data.
Dependencies are inferred from the claim text.