Title :
Geometric accuracy in airborne SAR images
Author :
Blacknell, D. ; Freeman, A. ; Quegan, S. ; Ward, I.A. ; Finley, I.P. ; Oliver, C.J. ; White, R.G. ; Wood, J.W.
Author_Institution :
GEC-Marconi Res. Center, Chelmsford, UK
fDate :
3/1/1989 12:00:00 AM
Abstract :
Uncorrected across-track motions of a synthetic aperture radar (SAR) platform can cause both a severe loss of azimuthal positioning accuracy in, and defocusing of, the resultant SAR image. It is shown how the results of an autofocus procedure can be incorporated in the azimuth processing to produce a fully focused image that is geometrically accurate in azimuth. Range positioning accuracy is also discussed, leading to a comprehensive treatment of all aspects of geometric accuracy. The system considered is an X-band SAR.<>
Keywords :
aircraft instrumentation; microwave imaging; position measurement; radar; X-band; airborne SAR images; autofocus; azimuth processing; azimuthal positioning accuracy; defocusing; geometric accuracy; microwave imaging; range positioning accuracy; synthetic aperture radar; Azimuth; Focusing; Synthetic aperture radar;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
