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This paper presents an efficient three-dimensional (3-D) SAR imaging algorithm using range migration techniques. The algorithm is used to form 3-D radar reflectivity images of targets measured in anechoic chambers. As an input, the algorithm requires frequency domain backscatter data which have been acquired using a stepped freqency system equipped with an antenna that synthesizes a 2-D planar aperture. Resolution in the vetical and horizontal cross-range directions is given by the dimensions of the synthesized aperture, whereas resolution in ground-range is provided by the synthesized frequency bandwidth. The presented formulation has been justified by using the stationary phase method. Results both with synthetic and measured backscatter data show the high-efficiency of the technique. The extension 2-D spherical aperture has been addressed. Results with this aperture geometry show that the technique is still highly efficient.

Additional information

Authors: SANCHEZ J M, Space Application Institute, Ispra (IT);FORTUNY GUASCH J, ;SEIBER A J,
Bibliographic Reference: Paper presented: Symposium of the Antenna Measurement, Antenna Measurement Techniques Association, Montreal (CA), October 26-30th, 1998
Availability: Available from DG XIII D-2 as Paper EN 41840 ORA
Record Number: 199910197 / Last updated on: 1999-03-12
Original language: en
Available languages: en