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Wide-swath space-borne SAR and range ambiguity

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2 Author(s)
Callaghan, G.D. ; Cooperative Res. Centre for Sensor Signal & Inf Process, Queensland Univ., Brisbane, Qld., Australia ; Longstaff, I.D.

The suppression of range ambiguities in space-borne SAR would permit a much larger swath, without loss of along-track resolution. Two previously suggested techniques for suppressing range ambiguities are investigated: the first relies upon SAR depth-of-focus; the second uses multiple transmit waveforms. We report that both techniques cause a severe integrated sidelobe ratio (ISLR) degradation, even though the range-ambiguity peak may be significantly lower than the mainlobe peak. Finally, we suggest a null-steering technique which forms nulls in the directions of range-ambiguous returns

Published in:

Radar 97 (Conf. Publ. No. 449)

Date of Conference:

14-16 Oct 1997