Decreasing range resolution of a SAR image to permit correction of motion measurement errors beyond the SAR range resolution

Patent Number: 7,760,128
Issued: 7/20/2010
Official Filing: View the Complete Patent
Abstract: Motion measurement errors that extend beyond the range resolution of a synthetic aperture radar (SAR) can be corrected by effectively decreasing the range resolution of the SAR in order to permit measurement of the error. Range profiles can be compared across the slow-time dimension of the input data in order to estimate the error. Once the error has been determined, appropriate frequency and phase correction can be applied to the uncompressed input data, after which range and azimuth compression can be performed to produce a desired SAR image.
Filed: 5/14/2008
Application Number: 12/120,265
Government Interests: STATEMENT OF GOVERNMENT INTEREST This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.