Wavenumber-domain SAR focusing from a nonuniform synthetic aperture
In the wavenumber-domain concept of SAR imaging, frequency-domain radar data are used to reconstruct a portion of the 2-D Fourier transform of the scene, which is then inverted to create the image. The method suffers no inherent limits on aperture length or scene size. This paper extends the concept to the case where the synthetic aperture is not a straight line and the samples are unevenly spaced. An accumulation formula for wavenumber-domain reconstruction is derived and shown to be equivalent to previously derived algorithms in the uniform-aperture case. It is then shown how data with three-dimensional irregularity in the aperture can be processed using height correction and mapping into the same plane. 10 refs., 3 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6132759
- Report Number(s):
- SAND-91-1633C; CONF-920354--1; ON: DE92003640
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
47 OTHER INSTRUMENTATION
99 GENERAL AND MISCELLANEOUS
990200* -- Mathematics & Computers
APERTURES
FOCUSING
FOURIER TRANSFORMATION
INTEGRAL TRANSFORMATIONS
MAPPING
MEASURING INSTRUMENTS
NONLINEAR PROBLEMS
OPENINGS
RADAR
RANGE FINDERS
SYNTHETIC-APERTURE RADAR
THREE-DIMENSIONAL CALCULATIONS
TRANSFORMATIONS
TWO-DIMENSIONAL CALCULATIONS