The authors describe an array-based approach to increasing the swath width of space-borne synthetic aperture radar beyond the limit normally imposed by ambiguity. The nulls of a quad-element rectangular array are used to suppress returns from range and azimuth ambiguities, allowing the swath to be increased by a factor of approximately four. A conceptual design is presented, based on ERS-1, that gives a swath extending from 250 km off nadir to over 700 km, with a blind region centred at 500 km. Some adaptive techniques for steering the nulls are discussed.
No takes yet. Share an insight, caveat, or question.
Callaghan et al. (1999) studied this question.